Zika

A small number of babies infected with Zika virus in the womb have developed a rare birth defect involving muscle weakness and stiff joints.

A new vaccine against the Zika virus is being tested in people, and researchers said they hope to have early results by the end of the year.

Pregnant women should avoid travel to a small part of Miami-Dade County in Florida where Zika appears to be spreading by mosquitoes, officials said today.

Four people in Florida likely became infected with the Zika virus after being bitten by mosquitos in the area, officials said today.

If the Zika virus is spreading in Florida, how did it get there?

In a puzzling case, a person in Utah became infected with the Zika virus, but health officials can't figure out how the person caught the disease.

A woman in New York City who was infected with Zika passed the virus to her male partner during sex, the first time that female-to-male sexual transmission of the virus has been reported.

The current Zika outbreak taking place in much of South and Central America will be largely over in three years' time, a new study predicts.

Will Olympic athletes return to their home countries with more than a medal?

When the U.S. Olympic team heads to Brazil, some athletes will be studied to see if they become infected with the Zika virus.