Contact tracing stories

Sep 19, 2026

Unvaccinated Amtrak passenger with measles travels across six California counties, prompting exposure alert

Public health officials issued warnings after an unvaccinated traveler infected with measles rode an Amtrak train from Chicago to Los Angeles, then traveled by trains and buses across at least six California counties before being hospitalized. Thousands of passengers may have been exposed to the highly contagious disease.

Sep 19, 20264 sources

May 27, 2026

Congo Ebola Outbreak Outpaces Global Response as Epidemic Spreads 'At Breakneck Speed'

Health teams are struggling to trace thousands of potentially exposed individuals as the Ebola outbreak in Congo spreads rapidly, with experts warning the outbreak went undetected for weeks. Community mistrust and attacks on health workers are hindering response efforts.

May 27, 20262 sources