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COVID-19: How protective are 3 vaccine doses at this point?

1 month ago
Duration 4:21

COVID-19: How protective are 3 vaccine doses at this point?

  • 1 month ago
  • News
  • Duration 4:21

Infectious diseases specialist Dr. Zain Chagla answers questions about how much protection three doses of a COVID-19 vaccine offer several months out, as well as the status of fourth vaccine doses.

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