Health experts are "fairly certain" that nine people had enough direct contact with an Ebola patient that they could potentially have been infected. None of them have shown symptoms, the CDC says.
A doctor at the Texas Health Presbyterian Hospital in Dallas says the list of "contact traces" has been narrowed and that "will be followed on a daily basis" to check for symptoms.
For the first time in nearly 20 years, federal money is flowing into gun violence research. There's also growing momentum behind creating a reliable national database for firearm injuries and deaths.
The World Health Organization warns of more than 20,000 cases by early November if help doesn't arrive quickly in West Africa. The CDC projects 1.4 million cases by late January.
The president announced a "major increase" in the U.S. response to the outbreak, including a new military command center in Liberia, and sending medical professionals from the U.S. to field hospitals.
The sloppy handling by federal scientists of the world's scariest germs must stop, says the dismayed head of the Centers for Disease Control and Prevention. Are his new rules enough?
Federal health officials warned that a dangerous group of superbugs has become increasingly common in hospitals. The bacteria are said to be resistant to virtually all antibiotics.
A government study of the medical records of 1,000 kids found no correlation between the number of vaccines a child received and his or her risk of autism spectrum disorder.
A team of eight people overseeing the critical foodborne illness tracking database PulseNet has been reduced to three. And a CDC division chief says that a multistate outbreak would push the remaining staff beyond their capacity.