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U.S. CDC says it's ready for seasonal booster shots if necessary Updated: 2021-05-09 14:12:20 KST

In the United States, the CDC is investigating the possible need for COVID-19 booster shots on a seasonal basis in case the existing vaccines lose their effectiveness.
That's according to CDC Director Rochelle Walensky, who was speaking Friday, U.S. time, to Hollywood actress Jennifer Garner in an official CDC Instagram Live.
Walensky said studies on booster shots are underway, and whether they're needed in six months, a year or two years, they're preparing to have them if needed, like the flu shot.
There have been reports that vaccines are less effective against the South Africa variant in particular, and preliminary results from Moderna suggest that booster shots do work.
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