Tiny particles that people expel when they sneeze, cough or talk are getting a close look for their ability to spread the new coronavirus.
They come in a range of sizes, and while public health advice was originally based on larger particles, the focus has shifted to risk from smaller ones.
These “aerosols" may explain how a single person can infect many others at a time in an enclosed area.
While questions remain about their significance, some scientists say the time to take protective measures is now.
(Copyright 2020 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed without permission.)
