Want to help prevent more variants down the road? Get vaccinated, CDC director says

Adequate rates of vaccination can help prevent the rise of new mutations that could force people to get booster after booster dose of Covid-19 vaccine, the head of the US Centers for Disease Control and Prevention said Sunday. The CDC and the US Food and Drug Administration recommended booster shots for many Americans last week to help preserve their immunity. But that doesn't necessarily mean people will need to keep getting boosters. CDC Director Dr. Rochelle Walensky told CBS's 'Face the Nation.'