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Vaccine makers testing COVID booster shots

Posted at 7:15 AM, Apr 12, 2021
and last updated 2021-04-12 11:16:31-04

As new variants continue to emerge, the leading vaccine makers are beginning to test booster shots.

And they're experimenting with a variety.

13 Action News anchor Jackie Kostek has a report on the four leading strategies.

Watch the full story in the player above.