Travelers infected with the Zika virus in the Caribbean brought it to South Florida multiple times before officials realized it had reached the U.S., an analysis of virus genomes finds.
The new leader, Tedros Adhanom Ghebreyesus of Ethiopia, will be expected to reform the bureaucratic agency and deal with the world's growing health problems.
The president has long looked to China and India as a model for galloping economic growth. Here's why it's unlikely that the U.S. could grow even half as fast.
Two travel tips are often overlooked by clinicians, and can be especially helpful when people are headed to places with less-than-ideal plumbing and sewage systems.
Foreign aid restrictions introduced by President Ronald Reagan in 1984 have been expanded by the Trump administration. They could hinder HIV prevention and the fight against infectious disease.