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Being overweight or obese can diminish the effectiveness of a flu shot, researchers say. Derek Davis/Portland Press Herald/Getty Images hide caption

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Derek Davis/Portland Press Herald/Getty Images

Shots - Health News

Excess Weight Can Weaken The Flu Shot

November 24, 2019 • Scientists have come to realize that flu vaccines are less effective for people who are overweight or obese. Now researchers are trying to figure out why and hope to develop better vaccines.

Excess Weight Can Weaken The Flu Shot

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Measles Is Spiking Around The Globe. How Worried Should We Be?

Measles cases have spiked globally after years of decline. Here, a family physician prepares a measles vaccine in Bucharest, Romania. Doctors there say that parental hesitancy about vaccines and lack of faith in state institutions have hurt immunization efforts. Daniel Mihailescu/AFP/Getty Images hide caption

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Daniel Mihailescu/AFP/Getty Images

Goats and Soda

Measles Is Spiking Around The Globe. How Worried Should We Be?

March 12, 2019 • There are outbreaks in rich countries and poor countries, from the United States to Madagascar. And the World Health Organization says vaccine hesitancy is a top 10 threat to global health.