| A growing number of people — now more than one in 10 — have missed their second dose of COVID-19 vaccine in the United States, a cause for concern as the more transmissible delta variant gains a foothold.
As of June 16, about 88% of those who received one dose of vaccine and were eligible for their second — recommended 21 days after the first Pfizer/BioNTech shot or 28 days after the first Moderna shot — had completed their two-dose series, according to data shared with CNN by the U.S. Centers for Disease Control and Prevention.
That’s down from a 92% completion rate earlier in the year.
Studies have shown that the vaccines are much more effective against the delta variant — first identified in India — after completion of the two-dose series.
“As this virus has mutated, there are versions of it which are better able to escape some of the immune protection that we get from the vaccine,” U.S. Surgeon General Dr. Vivek Murthy told CNN last week, citing research that found that two doses of the Pfizer/BioNTech vaccine offered 88% protection, compared to 33% protection after just one.
“The key is, get vaccinated. Get both doses,” he said.
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