Infectious Disease
Ebola cases have steadily declined in Liberia and Sierra Leone over the past several weeks. World Health Organization hide caption
People who visited Disneyland in December were at risk of getting an unwelcome souvenir: the measles. George Frey/Landov hide caption
Biologist Rob Knight, co-founder of the American Gut Project, recently moved the project to the University of California, San Diego's School of Medicine. Casey A. Cass/University of Colorado hide caption
Bruno Mbango Enyaka gets his flu shot at a community health center in Portland, Maine, on Jan. 7. Gabe Souza/Press Herald via Getty Images hide caption
Ignaz Semmelweis washing his hands in chlorinated lime water before operating. Bettmann/Corbis hide caption
Health officials speculate that an international visitor to Disney California Adventure Park and Disneyland must have spread measles there. George Frey/Landov hide caption
You don't want to run into methicillin-resistantStaphylococcus aureus (MRSA) bacteria. A potential new antibiotic could help fight this bug. CDC hide caption
Scientists Hit Antibiotic Pay Dirt Growing Finicky Bacteria In Lab
A woman protects her child's face in Managua, Nicaragua, as health workers fumigate for mosquitoes that carry chikungunya. The virus started spreading through Nicaragua and Mexico in the fall. Esteban Felix/AP hide caption
Last fall's state-ordered quarantine of nurse Kaci Hickox (shown here with her boyfriend, Theodore Michael Wilbur, in late October) started at the airport in Newark, N.J., then followed her home to Fort Kent, Maine. Hickox treated Ebola patients in Africa but never had the illness. Spencer Platt/Getty Images hide caption
A little nudge via text can help parents get the kids in for a second flu immunization, a study finds. Arman Zhenikeyev/Corbis hide caption
The hepatitis C medication Sovaldi, from Gilead Sciences, costs $1,000 per pill. It's just one of the new medications introduced in the past year that can cure the disease within weeks or months. Courtesy of Gilead Sciences via AP hide caption
A transmission electron micrograph shows Middle East respiratory syndrome coronavirus particles (colorized yellow). NIAID hide caption