The Delta variant has caused more breakthrough cases in vaccinated people than other strains. Experts told Newsweek what this means for future mutations that may be even more contagious.
The global health community is responding to the death of a health care worker from the Marburg virus, a highly infectious disease that is "clinically similar" to Ebola
Isolating countries in west Africa that have experienced an outbreak of the disease in order to prevent it from spreading here would be "quick, simple -- and wrong," the director of the CDC said in a press briefing Thursday.
For the Ebola outbreak to end in six to nine months, a "massive" global response is needed
Sheik Umar Khan, 39, has treated more than 100 victims