Zika

Pregnant women who become infected with Zika virus may be at risk not only for having a child with microcephaly, but also other serious problems in the fetus.

New evidence suggests that the Zika virus may indeed be a cause of the rare neurological problem Guillain-Barré sydrome, which in severe cases can cause muscle paralysis.

Nine pregnant women in the U.S. have now been confirmed to have had Zika virus infections that they contracted through travel to places where the virus is spreading, U.S. health officials said today.

A stillborn baby in Brazil showed evidence of a Zika virus infection, a new report says.

Travelers returning from countries with known Zika virus outbreaks should practice safe sex, according to the CDC.

A new vaccine against the Zika virus shows promising results in mice, a pharmaceutical company announced in a statement yesterday (Feb. 17).

The Zika virus was found in the amniotic fluid of two women who were pregnant, confirming that the virus can cross the placenta, new research confirms.

Can gene warfare defeat the Zika virus?

Is the Zika virus causing microcephaly in infants? Researchers will do a case-control study to find out more. Here's how it will work, and why that type of study is needed.

Puerto Rico reported its first locally transmitted case of Zika in late December, and health care workers now have diagnosed a total of 30 people with the virus, according to a new report.