Drop in Cases of Zika Threatens Large-Scale Trials

Scientific American ------ Studies of thousands of pregnant women that were set up to probe the link between Zika and birth defects may not provide definitive answers because of a sharp drop in the number of new cases, researchers have warned. The unexpected development is making the disease harder to study, and threatens to hamper trials of experimental vaccines that might protect pregnant women in future outbreaks. “We’re seeing few, if any, cases, particularly in southern Brazil, which we thought might be the next big area to be hit this year,” says Oliver Brady, an epidemiologist at the London School of Hygiene and Tropical Medicine. To learn more click on the picture below to read the article.