Medical research

Designing better contact-tracing apps for the next pandemic

As COVID-19 began to spread last spring, apps were developed to track cellphone signals and other data so people who had been near those who were infected could be notified and asked to quarantine. The novel coronavirus rapidly ...

Diseases, Conditions, Syndromes

CDC says coronavirus can spread indoors in updated guidance

The top U.S. public health agency said Monday that the coronavirus can spread more than 6 feet through the air, especially in poorly ventilated and enclosed spaces. But agency officials maintained that such spread is uncommon ...

Diseases, Conditions, Syndromes

CDC changes, then retracts, web posting on how virus spreads

The top U.S. public health agency stirred confusion by posting—and then taking down—an apparent change in its position on how easily the coronavirus can spread from person to person through the air.

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