Health policy
News Type
Commentary
Date
Paragraphs

Doctors, nurses and other medical staff in Myanmar are wearing black ribbons to protest the appointments of military personnel in the Ministry of Health.

“The Black Ribbon Movement Myanmar 2015,” which began on Facebook in early August, quickly amassed over 42,000 followers, and on Aug. 12, led the minister for health to drop plans to appoint military personnel to over 300 management positions within the ministry.

Writing for The Diplomat, Stanford visiting scholar Phyu Phyu Thin Zaw said the movement shows the dissatisfaction shared among her fellow doctors about the incursion of the military in the healthcare sector. She said it's also representative of greater injustices seen across Myanmar. 

Four years have passed since the country transitioned from military rule toward democratization, and the Ministry of Health among other civic organizations still see the military exert influence over its operations.

Thin Zaw said she remains optimistic, though, and views the movement as a sign of the reemergence of a proactive civil society. The movement continues on this Facebook page.

The article published in The Diplomat can be found by clicking here.

Hero Image
myanmar health profession wearing black ribbon to participate in black ribbon movement myanmar 2015
All News button
1
News Type
News
Date
Paragraphs

Video of A career in Economics...it's much more than you think

Marcella Alsan, an assistant professor of Medicine and CHP/PCOR core faculty member, shows how economics is a broader field than most people realize in this video produced by the American Economic Association (AEA).  Along with other top economists, she discusses the interdisciplinary nature of economics, specifically as it relates to global health.  Alsan states that "without understanding economic principals and economic forces, [there is] a real gaping hole in actually practicing medicine."  Understanding economics can help us to understand policy decisions and to tackle the broad problems of society.

Hero Image
aea video AEA
All News button
1
Authors
Beth Duff-Brown
News Type
News
Date
Paragraphs

 

Although the expansion of Medicaid under the Affordable Care Act has made millions of low-income and rural Americans eligible for health insurance, many states don’t provide dental coverage for adults under their Medicaid programs.

Paying for dental insurance on the individual market or paying for dental services out of pocket is cost-prohibitive for Medicaid beneficiaries, many of whom are at or beneath the federal poverty level.

So many have turned to emergency rooms for such care.

More than 2 percent of all emergency department visits are now related to nontraumatic dental conditions, according to a study by researchers at Stanford University, the University of California-San FranciscoTruven Health Analytics and the federal Agency for Healthcare Research and Quality.

The researchers said Medicaid dental coverage could help reduce the need for many low-income Americans to visit emergency departments for dental conditions that may have otherwise been prevented with adequate access to basic dental care.

“It is likely that EDs will continue to provide care to individuals without adequate access to community-based dental care unless new dental service delivery models are developed to expand access in underserved areas, and unless more dental providers begin to accept Medicaid under the ACA,” the researchers wrote in their study, which was published today in Health Affairs.

 

Read full article

Hero Image
dental
All News button
1
Authors
News Type
News
Date
Paragraphs

Despite potential legal and enforcement challenges, California’s new vaccination law may set a precedent for other states, according to Stanford scholars.

The law, SB 277, ends exceptions to vaccination mandates based on religious and philosophical beliefs, leaving only medical exemptions as a path to avoid the vaccinations children are required to have before entering school.

David Studdert, a core faculty member at the Center for Health Policy/Center for Primary Care and Outcomes Research, and Michelle Mello, a core faculty member of Health Research and Policy, authored a report on the new law along with Northwestern Law School’s Wendy Parmet, which appears today in the New England Journal of Medicine. Studdert and Mello are both professors of law and medicine at Stanford.

Studdert, Mello, and Parmet discuss four factors that led to passage of the law. Strong advocacy by several members of the California legislature was one factor.  Another was the state’s efforts to publicize data showing that personal belief exemptions have doubled since 2007, enough to endanger the community. In addition, there is mounting evidence that the recent measles outbreak at Disneyland could have been prevented by better vaccination compliance. Finally, supporters of SB 277 highlighted the risks unvaccinated school children pose to vulnerable classmates. According to the report, “the bill’s proponents focused on the specific threat to schoolchildren who are too medically fragile to receive vaccinations, effectively framing vaccine refusal as a decision that endangers others rather than a purely ‘personal’ one.”

SB 277 could place pressure on other states to tighten their exemptions for school-entry vaccination requirements. At this time, only West Virginia and Mississippi have legislation that prevents personal belief exemptions for vaccination. Adding California may give such laws national attention, and Studdert said that this development may be an “indication that politics are starting to shift.”

However, opponents of the law are likely to challenge it in court. Challengers may argue that the law impinges on their First Amendment rights to free exercise of religious beliefs or that it violates unvaccinated children’s right to access public schools.  However, Studdert “would be very surprised if SB 277 ends up being struck down as a result of such challenges.”  In the past, courts have ruled in favor of public health agencies in similar cases. “For over a century, appellate courts accepted arguments that mass vaccination is crucial to the well-being of the community.”

A more difficult challenge is enforcement of the law. Unvaccinated children can still attend school as long as their parents pledge to complete the children’s required vaccinations, and schools are not penalized for failing to follow up. The authors argue that “state laws should instead task health departments with enforcement responsibility for vaccination mandates” in order to boost compliance. “Willing providers,” or doctors who sympathize with vaccination opponents, may also undermine enforcement if they choose a broad interpretation of the medical exemption criteria. Other ways around the stricter requirements include home-schooling and nannies. This would not affect school safety but could have implications for the larger community.

Hero Image
baby vaccination KevinMD
All News button
1
Authors
Beth Duff-Brown
News Type
News
Date
Paragraphs

Foreign aid to the public health sectors of developing countries often appears to be allocated backwards: The global burden of non-communicable diseases such as diabetes or heart disease is enormous – yet they receive little health aid. 

By comparison, the global burden of HIV is much smaller, yet it receives more health aid than any other single disease.

So will a wholesale reversal in health aid priorities improve global health? The answer, according to a new study by Stanford researchers, is that if the goal is to maximize the health benefits from each donor dollar, health aid is actually allocated pretty well.

Still, reallocating foreign aid to step up the fight against malaria and TB could lead to greater overall health improvements in developing nations. And it could be done without spending more money, the researchers have found.

Eran Bendavid, an assistant professor in the Department of Medicine and a core faculty member at the Center for Health Policy and Center for Primary Care and Outcomes Research, and three Stanford research assistants write in the July issue of Health Affairs that more health aid is going to disease categories with more cost-effective interventions.

"What we found, somewhat to our surprise, is that in nearly all countries, more aid was flowing to finance priorities with more cost-effective options,” Bendavid said in an interview. “That is partly because more aid was flowing to the treatment and prevention of infectious diseases such as HIV and malaria, and their management can be relatively inexpensive, even if the burden of these diseases is lower than that of non-communicable diseases.”

Bendavid, an infectious disease physician, added: “Conversely, even though the burden of non-communicable diseases is high and growing, addressing these chronic conditions such as diabetes and heart disease is, broadly, more costly than the unfinished infectious disease agenda.”

The authors also show that just because health aid is broadly allocated toward better cost-effectiveness does not mean that it cannot be better allocated.

The biggest gains would come from taking some of the foreign aid earmarked for HIV or maternal, newborn or child health, and putting it toward programs to treat malaria and tuberculosis, they write.

The Stanford research team reviewed the literature for cost-effectiveness of interventions targeting five disease categories: HIV, malaria, tuberculosis, non-communicable disease and maternal, newborn and child health.

What they found was that aid from wealthy nations to developing ones might be allocated efficiently, but that the money is not always spent in the best interest of curbing the communicable diseases that would improve the overall health of a nation.

It is crucial, therefore, to further study the consequences of realignment of donor funds.

Public health aid is critical to most developing countries. Development assistance from high-income countries to public health sectors of low- and middle-income countries amounts to nearly 40 percent of public health spending in countries with a per capita GDP of less than $2,000.

The researchers focused on 20 countries that received the greatest total amount of aid between 2008 and 2011, a period of historically unprecedented growth in health aid. Development assistance has since flattened, however, so the authors believe it’s increasingly important to consider best value when investing limited resources.

The 20 countries studied ­– from Afghanistan to Zambia – received $58 billion out of the total $103.2 billion in recorded health aid disbursements to 170 countries between 2001 and 2011.

“Over the period of 2001-2011, a greater amount of disbursements flowed to HIV programs than any other disease category,” the authors write. “On average, interventions addressing malaria and had the lowest incremental cost-effectiveness ratio (ICER), which indicates that malaria interventions could yield greater health improvements from each dollar compared with the interventions having a higher ICER.”

The authors analyzed the data and determined that the alignment improves if up to 61 percent of HIV aid is reallocated for TB control and up to 80 percent is reallocated for malaria control.

“Our evidence suggests that the greatest improvements in the efficiency of global health dollars could result from reallocating funds to malaria and TB control programs,” the authors write.

“This study shows, for the first time, that the current allocation of health aid is generally aligned with the cost-effectiveness of targeted interventions. Contrary to common views that advocate for reprioritization toward non-communicable diseases, our data suggest that the alignment could best be improved by focusing on malaria and TB, especially where addressing those diseases is highly cost effective.”

The other authors of the study are Andrew Duong and Gillian Raikes, both research assistants in the Program of Human Biology; and Charlotte Sagan, a RA in the School of Medicine.

Hero Image
malaria The Gates Foundation
All News button
1
News Type
News
Date
Paragraphs

 

The increasing resistance to antimicrobial drugs is a growing public health concern, particularly in low- and middle-income countries that require high out-of-pocket payments for prescription drugs.

“Understanding the drivers of antibiotic resistance in low- to middle-income countries is important for wealthier nations because antibiotic-resistant pathogens, similar to other communicable diseases, do not respect national boundaries,” said Marcella Alsan, MD, PhD, MPH, the lead author of the study, which was published July 9 in The Lancet Infectious Disease.

Alsan is an assistant professor of medicine at Stanford, an investigator at the Veterans Affairs Palo Alto Health Care System and a core faculty member at the Center for Health Policy/Center for Primary Care and Outcomes Research.

“Out-of-pocket health expenditures are a major source of health-care financing in the developing world,” said Jay Bhattacharya, MD, PhD, senior author of the study and a professor of medicine, a senior fellow at the Freeman Spogli Institute for International Studies and another core faculty member at CHP/PCOR.

 

Read the full article here.

Hero Image
drug resistance
Yom Nob, a lab technician at Ta Sanh Health Center, Cambodia sends a text message to a new drug resistance alert system. The WHO and its partners use the alert system to map and track drug resistant cases of malaria.
The Gates Foundation
All News button
1
Authors
Beth Duff-Brown
News Type
News
Date
Paragraphs

 

Rates of obesity in the United States remain extremely high. New statistics show that nearly two-thirds of adults are at an unhealthy weight and that – for the first time ever – obese Americans now outnumber those who are merely overweight.

Two Stanford public health law experts say one of biggest culprits of the obesity epidemic – on top of fast foods and our sedentary lifestyle – are sugary drinks.

And they believe the sweet spot for public health law in curbing the adverse effects of sugar-sweetened beverages (SSBs) lies in the strategic use of measures such as higher SSB taxes, limits on advertisements targeting kids, and restrictions on soft drinks and sugar-sweetened teas and sports drinks in government institutions, such as public schools.

“It’s always possible to get more and better evidence about the effectiveness of public health laws,” says David Studdert, a professor of medicine at the Stanford School of Medicine, professor at the Stanford Law School and core faculty member at the Center for Health Policy/Center for Primary Care and Outcomes Research.

Image

“But enough is already known about the promise of some legal interventions to curb SSB consumption – significant tax hikes and advertising restrictions are two good examples – to be fairly confident that they would make a difference.”

Studdert is the lead author of a review paper published July 7 in PLoS Medicine, entitled, “Searching for Public Health Law’s Sweet Spot: The Regulation of Sugar-Sweetened Beverages.”

Studdert and senior author Michelle Mello, professor of law and professor of health research and policy at the School of Medicine, and co-author Jordan Flanders, a former Stanford Law School student, argue that sugary drinks are a substantial, yet preventable contributor to the global burden of obesity and associated health conditions.

A new study published June 29 in the American Heart Association journal Circulation linked the consumption of sugary drinks to an estimated 184,000 adult deaths each year, with more than 25,000 of those Americans. The study, conducted by researchers from Tufts University, found that the beverages are responsible for an estimated 133,000 of those deaths from diabetes, 45,000 from cardiovascular disease and 6,450 from cancer.

While Americans’ consumption of sugary drinks has plateaued, according to the Tufts study, about three-fourths of the deaths due to SSBs are now in developing countries. Mexico leads with 24,000 total deaths. The United States still ranks fourth, however, just behind South Africa and Morocco.

The Stanford researchers say the evidence shows that sugary drinks are contributors to the global obesity epidemic, but the appropriate reach of regulation to curtail SSB consumptions remains highly contested.

The main regulatory approaches to SSBs are higher taxes, restrictions on the availability of the sugar-sweetened drinks in schools, restrictions on advertising and marketing, labeling requirements and government procurement and benefits standards.

Image

“Finding public health law’s sweet spot requires regulatory approaches that are capable both of achieving measurable improvements to public health and of winning victories in courts of law and public opinion,” the researchers write.

Over the last decade, many national, state, and local governments have introduced laws aimed at curbing consumption of sugar-sweetened beverages (SSBs), especially by children. The main regulatory approaches have been taxes, restrictions on the availability of SSBs in schools, calls for controls on advertising and marketing, labeling requirements, and government procurement and benefits standards.

But efforts to regulate the drinks often encounter stiff opposition, including claims that the laws are inequitable, do not achieve their goals, and have negative economic effects.

New York City’s attempt to ban the sale of jumbo-sized sugary drinks sold in city restaurants, theaters and food carts triggered international headlines and a firestorm of opposition. The soft drink industry embarked on a multimillion-dollar campaign to block the proposal championed by former Mayor Michael Bloomberg.

The proposal died last year when the New York State Court of Appeals ruled that the city’s Board of Health had “exceeded the scope of its regulatory authority.”

Taxes on SSBs, the most commonly adopted measure, vary widely, the authors write. A few countries, most notably several South Pacific island nations, where obesity rates are among the highest in the world, have introduced very high taxes on sugary drinks.

But most sugar-sweetened beverage taxes add between 5 and 9 cents per liter. This is well short of the level that experts argue is needed to significantly affect consumption and weight outcomes: a sales tax of at least 20 percent of the container’s price or a specific excise tax of 1 cent per ounce.

“In the United States, there have been many government proposals to introduce or raise taxes – most unsuccessful,” the authors write. “The beverage industry has invested heavily in public relations firms and `grassroots’ organizations to oppose the initiatives.”

Image

Berkeley, Calif., recently became the first U.S. city to pass an SSB tax, a penny-per-ounce excise on soda distributors, but a similar ballot measure in nearby San Francisco failed. At least 22 states have proposed SSB taxes since 2010, but only one state, Washington, passed a measure at the level recommended by economists – and it was repealed the following year in a voter referendum.

Yet U.S. childhood obesity has more than doubled in children and quadrupled in adolescents in the past 30 years, according to the Centers for Disease Control and Prevention. More than one-third of children and adolescents are overweight or obese.

“There is broad consensus in the public health community that reducing the influence of advertising is a critical step in addressing the spread of childhood obesity,” the authors say.

The United States and Canada have sought to regulate advertisers through a soft approach — mainly via voluntary guidelines and pressure to self-regulate, the authors write.

“These appear to have had only a modest impact on marketing practices,” they said. “U.S. regulators face considerable legal barriers in going further, including courts’ increasingly expansive interpretations of the scope of protected commercial speech under the First Amendment. Unless judicial currents shift, it will remain extremely difficult to impose restrictions on SSB advertising.”

Mello said low- and middle-income countries should anticipate that SSB companies will increasingly target them as promising markets, and that those developing countries should start crafting their regulatory responses now.

“Our experience with tobacco control teaches us that lower- and middle-income countries need to become wary when product regulation in the U.S. tightens,” Mello said. “Like squeezing a balloon, it pushes companies to intensify their marketing efforts overseas, and our public health problems get exported."

And, the authors note, while policy nudges have become fashionable, “there are dangers in treading too lightly.” “Strategies such as calorie labels, portion caps, and small beverage taxes preserve consumer freedom but are typically too modest to affect consumer behavior – and such modesty can be recast as arbitrariness. Industry opposition will come whether the intervention is modest or aggressive but should be easier to combat if officials can show their policy is effective,” they wrote.

“One somewhat surprising message that comes from reviewing how courts have handled challenges to SSB laws is that regulators can run greater risks of having their laws struck down if they are too timid,” Studdert said.

“Courts weigh effectiveness, and modest attempts to change behavior are often ineffective,” he said. “So one piece of advice regulators in this area should consider is to ‘go big or go home’.”

Hero Image
old fashioned soda Library of Congress
All News button
1
News Type
Q&As
Date
Paragraphs

Demographic change is fast becoming one of the most globally significant trends of the 21st century. Declining fertility rates and rising life expectancy -- two of the patterns triggering demographic change -- will cause vast socioeconomic strains, especially in the Asia-Pacific region, which has some of the world's most populous countries. Stanford health researcher Karen Eggleston says comparison and cross-collaboration are needed to induce creative solutions.

In an interview with the Office of International Affairs, Eggleston discusses her research approaches and partnerships in the study of healthcare systems and health policy in the Asia-Pacific region. She leads a multiyear research initative that examines comparative policy responses to demographic change in East Asia. Eggleston says the goal is to help move global health policy to a place where everyone has an "equal opportunity for a healthier and longer life."

The Q&A may be viewed in full by clicking here.

Analyzing demographic change in China, Japan and South Korea is the focus of the book Aging Asiaan outcome of a conference between the Walter H. Shorenstein Asia-Pacific Research Center and the Stanford Center on Longevity.

Eggleston also coedited a special issue of the Journal of the Economics of Ageing with David Bloom, a professor at Harvard University, looking at a range of economic issues related to population change in China and India.

Hero Image
dsc 4402 online
Karen Eggleston (left) confers with a healthcare worker at a primary care clinic in Hangzhou, China.
Robin Yao
All News button
1
Authors
Beth Duff-Brown
News Type
News
Date
Paragraphs

 

“I am the first child of my parents. I have a small brother at home. If the first child were a son, my parents might be happy ... but I am a daughter. I complete all the household tasks, go to school, again do the household activities in the evening … my parents do not give value or recognition to me.”

 

Stanford Assistant Professor of Medicine Marcella Alsan often refers to this comment by a 15-year-old girl from Nepal when she talks about how the division of labor among men and women starts at a young age in the developing world.

“Anecdotally, girls must sacrifice their education to help out with domestic tasks, including taking care of children, a job that becomes more onerous if their younger siblings are ill,” said, Alsan, a core faculty member at the Center for Health Policy/Center for Primary Care and Outcomes Research (CHP/PCOR) within the Freeman Spogli Institute of International Studies, and the Department of Medicine.

More than 100 million girls worldwide fail to complete secondary school, despite research that shows a mother’s literacy is the most robust predictor of child survival. So Alsan is analyzing whether medical interventions in children under 5 tend to lead their older sisters back to school.

She is one of two winners of this year’s Rosenkranz Prize for Health Care Research in Developing Countries, awarded by CHP/PCOR to promising young Stanford researchers.

Her Stanford Department of Medicine colleague, Jason Andrews, is the other recipient of the $100,000 prize given to young Stanford researchers to investigate ways to improve access to health care in developing countries.

Andrews is looking at cheap, effective diagnostic tools for infectious diseases, while Alsan is researching how older girls in poorer countries are impacted by the health of their younger siblings.

“My proposed work lays the foundation for a more comprehensive understanding of how illness in households and early child health interventions impact a critical determinant of human development: an older girl’s education,” she said.

Image

Alsan, the only infectious-disease trained economist in the United States, said Stanford is the ideal place to carry out her interdisciplinary global health research.

“I am humbled and honored to receive this prize, since Dr. Rosenkranz has done so much for women’s health worldwide,” she said.

Alsan – an MD with a specialty in infectious disease who has a PhD in economics from Harvard – said she intends to estimate the impact that illnesses in under-5 children have on older girls’ schooling using econometric tools.

She will compile data from more than 100 Demographic and Health Surveys (DHS) covering nearly 4 million children living in low- and middle-income countries.

The surveys ask about episodes of diarrhea, pneumonia and fever in children under 5 and record data on literacy and school enrollment for every child in the household.

Alsan also intends to collaborate with partners in sub-Saharan Africa to study the gendered effect of household illness on time use, using culturally appropriate questionnaires.

Douglas K. Owens, a Stanford professor of medicine and director of CHP/PCOR, called Alsan’s work “groundbreaking.”

“Although training is critical, more importantly, her work to date shows a degree of innovation, creativity and rigor that led us to conclude she was likely to become one of the top investigators in her field worldwide,” he said.

Low-Cost Diagnostic Tools

Andrews, also an assistant professor of medicine, has been working on ways to bring low-cost diagnostic tools to impoverished communities that bear the brunt of disability and death from infectious disease.

“I began working in rural Nepal as an undergraduate student and as a medical student founded a nonprofit organization that provides free medical services in one of the most remote and impoverished parts of the country,” Andrews said. “As I became a primary physician, and then an infectious diseases specialist, one of the consistent and critical challenges I encountered in this setting was routine diagnosis of infectious disease.”

He said those routine diagnostics were typically hindered by lack of electricity, limited laboratory infrastructure and lack of trained lab personnel.

“In my experiences working throughout rural Nepal – and in India, South Africa, Brazil, Peru and Ethiopia – I found these challenges to be common across rural resource-limited settings,” said Andrews, who founded a nonprofit Nyaya Health – recently renamed Possible Health – which provides modern, low-cost healthcare to rural Nepal.

Andrews has been collaborating with engineers to develop an electricity-free, culture-based incubation and identification system for typhoid; low-cost portable microscopes to detect parasitic worm infections; and most recently an easy-to-use molecular diagnostic tool that does not require electricity.

“The motivation for these projects was not to develop fundamentally new diagnostic approaches, but rather to find simple, low-cost means to make established laboratory techniques affordable and accessible,” he said.

Image
The Rosenkranz Prize will allow him to continue to develop a simple, rapid, molecular diagnostic for cholera that is 10 times more sensitive than the tests that are currently available. The diagnostic tool uses paper for DNA extraction, in contrast to traditional approaches that rely on expensive instruments requiring electricity and maintenance.

“We then perform isothermal amplification heated by a reusable, solar-heated, phase-change material,” Andrews said, adding that the entire process is completed in less than 20 minutes and can be performed by anyone with minimal training.

Andrews will enroll 250 patients with suspected cases of cholera in Nepal, using the new diagnostic tools and adapting as many local supplies as possible.

Andrews also intends to establish and curate a website to gather open-source ideas and evidence on diagnostic techniques for use in the developing world.

“Stanford is one of the world’s greatest hubs for innovation and information sharing as pertains to science and technology and is an ideal home for this venture,” he said.

In the current scientific climate, most National Institutes of Health grants go to established researchers. The Rosenkranz Prize aims to stimulate the work of Stanford’s bright young stars – researchers who have the desire to improve health care in the developing world, but lack the resources.

The award’s namesake, George Rosenkranz, first synthesized cortisone in 1951, and later progestin, the active ingredient in oral birth control pills. He went on to establish the Mexican National Institute for Genomic Medicine, and his family created the Rosenkranz Prize in 2009.

The award embodies Dr. Rosenkranz’s belief that young scientists hold the curiosity and drive necessary to find alternative solutions to longstanding health-care dilemmas.

“As in past years, the competition was extremely tough,” said Grant Miller, a senior fellow at the Freeman Spogli Institute and associate professor of medicine who chaired the prize committee this year.

“It’s exciting to see all of the truly innovative global health research being done by junior scholars at Stanford,” he said. “Both Jason and Marcella really exemplify this – and the legacy of George Rosenkranz.”

Image

 

Hero Image
african girls study
All News button
1
News Type
News
Date
Paragraphs

Bad weather in sub-Saharan Africa increases the spread of HIV, according to a study published in the June 2015 issue of the Economic Journal, co-authored by Stanford professor and FSE fellow Marshall Burke.

When the rains fail, farmers in rural areas often see their incomes fall dramatically and will try to make up for it however they can, including through sex work. Analysing data on more than 200,000 individuals across 19 African countries, the research team finds that by changing sexual behaviour, a year of very low rainfall can increase local infection rates by more than 10%.

The results have important policy implications for fighting the spread of the epidemic, as co-author Erick Gong of Middlebury College notes:

‘Existing approaches to stopping the spread of HIV – such as promoting condom use and the use of anti-retrovirals – remain critically important. But our results suggest that other policy approaches could be very useful too – in particular, approaches that provide safety nets to rural households when the weather turns bad.’

Policies and investments seemingly unrelated to HIV – such as the promotion of rural insurance or household savings schemes, or the development of drought-tolerant crops – might have surprising benefits in slowing the HIV epidemic. Co-author Kelly Jones of the International Food Policy Research Institute says:

‘The HIV/AIDS epidemic remains one of the world’s greatest health challenges, with over a million new infections per year in Africa alone. Our results expand the menu of options for addressing the epidemic, and highlight some surprising options that are not at the forefront of people’s minds.’

The research sheds valuable light on why HIV continues to spread in Africa. Previous studies have documented in limited settings that poor women often alter their sexual behaviour in response to an income shortfall. But until now, there has been little evidence that this response is big enough to affect the trajectory of the HIV epidemic.

To fill this gap, the researchers combined data on the HIV status of thousands of people across sub-Saharan Africa with data on the recent rainfall history in each individual’s location.

Because years of low rainfall can lead to much lower incomes in these locations, particularly in rural areas where people depend more heavily on agriculture for their livelihoods, variation in rainfall provides a way to study how changes in local economic conditions affect infection rates. Co-author Marshall Burke comments:

‘We were surprised by how strong the relationship is between recent rainfall fluctuations and local infection rates. As expected, the relationship is much stronger in rural areas, and particularly for women who report working in agriculture. These are the people who really suffer when the rains fail, and who are forced to turn to more desperate measures to make ends meet.’

Notes for editors: ‘Income Shocks and HIV in Africa’ by Marshall Burke, Erick Gong and Kelly Jones is published in the June 2015 issue of the Economic Journal.

Marshall Burke is an assistant professor of Earth System Science at Stanford University. Erick Gong is an assistant professor of economics at Middlebury College. Kelly Jones is a research fellow at the International Food Policy Research Institute (IFPRI).

For further information: contact Marshall Burke on +1-650-736-8571 (email: mburke@stanford.edu); Erick Gong on +1-802-443-5553 (email: egong@middlebury.edu); Kelly Jones on +1-202-862-4641 (email: k.jones@cgiar.org); or Romesh Vaitilingam on +44-7768-661095 (email: romesh@vaitilingam.com; Twitter: @econromesh).

Hero Image
75148497 50e081cd5b b Jon Rawlinson/flickr
All News button
1
Subscribe to Health policy