The CDC now recommends wearing a mask in some cases – a physician explains why and when to wear one
- Written by Thomas Perls, Professor of Medicine, Boston University
The change in CDC guidance comes in response to new research on how the new coronavirus can spread. Peter Denovo/Shutterstock.comThe Centers for Disease Control and Prevention has changed its policy and is now advising everyone, whether or not they have symptoms of COVID-19, to cover their face with a mask or cloth covering whenever social...


