Researchers warn against easing COVID-19 restrictions too soon as variants spread

As more Americans get vaccinated for the coronavirus, some governors are choosing to ease measures like statewide mask mandates. Jeffrey Shaman, director of the Climate and Health Program at Columbia University, joins CBSN to discuss his research team's model which details the estimated number of new coronavirus infections that may occur if guidelines are lifted amid the spread of highly contagious new variants.


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