epidemiology

A baby born with microcephaly reacts to stimulus during an evaluation session with a physiotherapist at the Altino Ventura rehabilitation center in Recife, Brazil on January 28, 2016.

We're not sure if Zika is causing all those microcephaly cases. But there's no evidence it's pesticides.

Brazil's surge in microcephaly cases has been widely blamed on the Zika virus. Now some claim it might be caused by pesticides, or even vaccines. We asked an NIH expert to sort out what we know from what we don't.

We're not sure if Zika is causing all those microcephaly cases. But there's no evidence it's pesticides.
A health worker takes a passenger's temperature with an infrared digital laser thermometer at Abidjan's Felix Houphouet Boigny International Airport in Cote d'Ivoire.

An Ebola patient in Dallas dies amid demands for more screening in the US

An Ebola patient in Dallas dies amid demands for more screening in the US
Some of the ultrastructural morphology displayed by an Ebola virus virion is revealed in this undated handout colorized transmission electron micrograph.

The current Ebola outbreak is huge, but at least it's not spreading particularly quickly

The current Ebola outbreak is huge, but at least it's not spreading particularly quickly