Cold germs from someone’s nose or cough can live on surfaces for hours to days, depending on many factors. Learn which surfaces to avoid or clean.

Washing hands properly for 20 seconds reduces the spread of flu and other viruses. Damp hands can transfer 1,000 times more ...

New York Times photographers covered Covid-19 throughout the world. These pictures, and the moments behind them, stayed with ...

Use precise geolocation data. Actively scan device characteristics for identification. Store and/or access information on a ...