Millions of Americans are not getting their second dose of the coronavirus vaccine within the recommended time period for ensuring optimal protection from COVID-19, according to a CBS MoneyWatch review of the latest data from the U.S. Centers for Disease Control and Prevention.

As of Wednesday, just over 2.8 million Americans who had received their first shot — nearly 12% of those vaccinated — had not gotten their second dose within the 28-day interval prescribed for Moderna’s vaccine, one of two approved for use in the U.S. The other vaccine, jointly produced by Pfizer and Germany’s BioNTech, is supposed to be administered 21 days after getting a first dose.

The number of people who have yet to get their second vaccine dose is based on the latest public data from the CDC. Vaccine and health care experts who reviewed the figures for CBS MoneyWatch said it jibes with scattered reports of delays in people getting both shots within the suggested time frame.


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