U.S. health officials say they are now convinced that Zika virus can target the developing brain before birth, leading to a severe type of microcephaly and other brain abnormalities.
To figure out how the outbreak began, scientists decoded the genomes of Zika viruses in Brazil. The findings suggest Zika could be hiding out in other corners of the world.
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.
Though Zika was discovered in 1947, few scientists since had studied the virus. Now, while some check its genes, others turn to placental cells for clues to any link between Zika and birth defects.
Ebola's physical legacy doesn't end when a patient leaves the hospital. A follow-up of the small group of patients treated in the U.S. finds many experienced various symptoms for months.
You're not just shedding microbes on every surface you touch. Research suggests you're actually walking around in an airborne plume of bacteria and other microscopic organisms that's unique to you.
The Heartland virus was considered rare. Scientists now say they've found signs of it circulating in animals across the Midwest, New England and the South. They think human cases have been missed.