So far, the U.S. territory has reported 117 Zika cases, including five pregnant women. But health officials say the real test will come when April and May rains bring more mosquitoes.
Although 84 percent of teenage boys and young men said they believed avoiding a partner's pregnancy was important, only 42 percent had heard of emergency contraception, researchers in Colorado found.
There's no vaccine yet, but Zika researchers are racing to find a good candidate. After testing it in animals, checking for effectiveness in humans might include injecting Zika into healthy people.
Facilities for delivering babies are expensive to run and hard to staff. But when small rural hospitals close their birthing units, pregnant women must travel much farther for care.
U.S. health officials say they have confirmed the two women had Zika. And their only risk factor was having slept with male partners who had recently traveled to places with active virus transmission.
U.S. disease detectives are launching a research project that health authorities hope will produce the most definitive evidence yet about whether the virus is really causing birth defects.
There have been several cases of abandoned babies already — at least three in Rio. And a psychologist believes that some men will walk out on their partner if a newborn has the birth defect.
Bringing kids to a museum or zoo can be great — until lunchtime. Often those cafeterias offer few healthful food options, but there's a movement to change that.
The number of homeless Californians under age 24 keeps rising, and many aren't getting the physical and mental health care they need, teen advocates say. Mobile clinics are trying to fill the gaps.