What are the Latest Guidelines about Wearing a Mask?

The CDC recently posted new guidelines about mask wearing, including doubling up on masks in certain situations. Is wearing two masks more effective in stopping the spread of COVID-19 and its new variants? Are there any instances where this might not be necessary? For how long will we need to wear masks?

Mary La Salvia, the director of Infectious Disease at Beth Israel Deaconess Medical Center, joins the program to answer the question “what are the latest guidelines about wearing a mask?”

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