Wear a mask is the message from health officials and the message has been amplified with the proliferation of the omicron variant of the coronavirus. But the type of mask you wear is also important. Dr. David Fisman, a professor of epidemiology at the Dalla Lana school of public health walks us through it.
Wear a mask is the message from health officials and the message has been amplified with the proliferation of the omicron variant of the coronavirus. But the type of mask you wear is also important. Dr. David Fisman, a professor of epidemiology at the Dalla Lana school of public health walks us through it.