Epidemiology

“We’re still in a pandemic,” says a lead COVID official with the World Health Organization

Measles cases have ticked up in the U.K. following lower rates of MMR vaccination, and the U.S. could see similar outbreaks

A spillover of the neurological disease to humans from deer, elk, and other animals could be devastating

Ancient DNA recovered from Brazilian remains shows that syphilis and other treponemal diseases originated some 10,000 years earlier than previously thought

Infants born to people who had COVID while pregnant are at a higher risk of respiratory distress, but vaccination greatly lowers the risk

Levels of opioids and other drugs in sewage could help public health authorities home in on drug use and target treatment efforts

Measles is extremely infectious. Vaccines provide good protection, but some adults may need a top-up shot

Proteins involved in immunity, clotting and inflammation could help to unravel the complexity of long COVID

When symptoms start, COVID tests may say you’re not infected when you really are.

A new variant of the COVID-causing virus SARS-CoV-2 is behind the latest surge in infections this winter, but it doesn't appear to cause more severe disease

Several new studies reveal that getting multiple COVID vaccine doses provides strong protection against lingering symptoms

Here’s how to plan COVID-safer holiday get-togethers, using websites that show viral levels in wastewater