More from The Zika virus, explained


It has to do with the “immune privileged” nature of the testes.


Evidence is mounting that it’s not just mosquitoes that can pass the disease from person to person.


These are the surprisingly basic facts scientists still don’t know about Zika.


“Avoiding pregnancy is not an absolute evil,” Francis said.


A closer look at an idea that’s creating lots of excitement — but also controversy.


The island nation is using reggae to educate the public about the virus.


Everything scientists know to date could basically fit into a shoebox.


A quick guide to the virus.


Mandatory quarantines were derided during the Ebola outbreak for good reason: They don’t work.


The outbreak is expected to hit Florida, Texas, and other states later this year.


The media keeps hyping gene warfare and other sci-fi tools to eradicate mosquitoes. Experts say the reality is quite different.


Scientists are just beginning to figure out how the virus is transmitted beyond just mosquito bites.


The first case of sexual transmission during this outbreak was just reported in Dallas.


A virus that causes birth defects is scary, but the medical uncertainty and legal barriers for pregnant women might be even scarier.


Brazilian health officials are working through the reports.


Sports: bringing the world (and its diseases) together.


These declarations are extremely rare. Here’s why.


It really depends on your situation.


The virus could be linked to microcephaly, which causes babies to be born with shrunken heads.


Until recently, health officials thought Zika was pretty harmless. Now they think it causes birth defects in newborns.


According to experts who study the disease, here are some key steps.


They should hold off for months — or even years.


Zika is a new, mostly harmless virus — except for pregnant women.


The Zika virus, circulating in more than a dozen countries in the Americas, prompted a CDC travel advisory.


The rare, incurable disease is spreading quickly across the Americas. Here’s what you need to know.