Three out of every four U.S. children have been infected with the coronavirus, CDC researchers estimated in a report.
“I did expect it to increase. I did not expect it to increase quite this much,” said Dr. Kristie Clarke, co-leader of a CDC team that tracks the extent of coronavirus infections.
Clarke said the tests can detect antibodies for one to two years after infection, and possibly longer. The study looked for any detectable level of antibodies; it did not distinguish how many people had antibody levels that might be protective. Scientists are still trying to understand what role these kinds of antibodies play in protection from future virus exposures.
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