Add Yahoo as a preferred source to see more of our stories on Google. Two measles cases with links to Massachusetts have prompted contact tracing. Dr. Todd Ellerin, of South Shore Health, explains ...

During the COVID-19 pandemic, Switzerland, like many other countries, relied on contact tracing to identify people likely to have been contaminated by an infected acquaintance. Has this strategy, ...

Electron microscope image of the virus that causes COVID-19. Photo: National Institute of Allergy and Infectious Diseases Apple and Google revealed Friday that they’re teaming up to take on one of the ...