Months after recovery from mild COVID-19, when antibody levels in the blood have declined, immune cells in bone marrow remain ready to pump out new antibodies against the coronavirus, researchers reported on Monday in Nature.
Most of them migrate to the bone marrow, explained coauthor Ali Ellebedy of Washington University School of Medicine in St. Louis. It is not clear yet whether the same results would be seen in survivors of moderate to severe COVID-19,Young children appear to be significant carriers of more contagious variants of the new coronavirus, such as the ones identified in the UK and in California, according to a new U.S. study.
The results provide “clear evidence” of the emergence of variants of concern in pediatric patients across diverse geographies and socioeconomic populations in the United States, the researchers said in their paper.
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