Lena H. Sun

Behind-the-scenes of nation’s worst ongoing measles outbreak

Public health workers are relying on word of mouth to fight a situation they expect will only get worse

Another rise in kindergarten vaccine exemptions in U.S.

Record high for the 2025-26 school year continues a trend

FDA travels to Mexico in wake of outbreak

Inspections to begin on facilities linked to cyclospora illnesses

Vaccines order in works despite midterm risks

CDC reports leap in cases

EXPANDS OUTBREAK TO 15 STATES

Taco Bell and lettuce probed in U.S. outbreak

Thousands fall ill, but source still a mystery

A microscopic parasite is driving an outbreak. Tracing it proves elusive.

Screwworm outbreak gains a U.S. foothold

Spread of flesh-eating maggot fuels scrutiny of Trump administration

Ebola responders say aid cuts left them ill-equipped for outbreak

Aid groups and health officials say they lacked the capacity to quickly detect early infections or contain the virus as cases surged in recent days.