Ebola Outbreak Is Now Third Largest in History. Here’s What to Know.

Vaccine developers are moving quickly as a rare Ebola strain spreads in a volatile region of Democratic Republic of Congo

The Next Frontier for Hantavirus: Finding Vaccines and Treatments

Some promising candidates are sitting on the shelf, awaiting funds before human tests

McDonald’s Quarter Pounders Linked to Deadly E. Coli Outbreak

At least one person has died and 49 were sickened in connection with the outbreak, according to the CDC