Government researchers say three out of every four U.S. children have been infected with the coronavirus.
and more than half of all Americans had signs of previous infections, Centers for Disease Control and Prevention researchers estimated in a report Tuesday.
The most striking increase was in children. The percentage of those 17 and under with antibodies rose from about 45% in December to about 75% in February. The older people were, the less likely they had evidence of past infections, the study found. For those 65 and older, 19% had signs of prior infection in December and 33% did in February. That may be because older adults have higher vaccination rates and they may be more likely to take other COVID-19 precautions, such as wearing masks and avoiding crowds, Clarke said.
Studies have shown previous infection can protect some people against severe disease and hospitalization, but CDC officials stressed that the previously infected should still get COVID-19 vaccines.
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