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COVID-19 Immunity Could Last for Years, Studies Say
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REPORT: COVID-19 Antibodies May Last a Lifetime
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Arabidopsis thaliana on a biochemical level.
The scientists also extended that characterization into the phytochromes of two important food crops: corn and potatoes. Instead of finding that all phytochrome isoforms are identical, they found surprising differences.
“A major hurdle toward understanding how phytochromes direct most aspects of plant growth and development has been defining how the related isoforms work collectively and uniquely to regulate specific cellular activities,” says Richard D. Vierstra, a professor of biology at Washington University in St. Louis.
Plants typically express three or more phytochromes. It was well-known that plants can respond to wide ranges of light intensities but other factors such as expression levels and signaling potential were considered as the likely culprits.
Those cells could persist for a lifetime, churning out antibodies all the while.
The findings in
Nature, suggest that mild cases of COVID-19 leave those infected with lasting antibody protection and that repeated bouts of illness are likely to be uncommon.
“Last fall, there were reports that antibodies wane quickly after infection with the virus that causes COVID-19, and mainstream media interpreted that to mean that immunity was not long-lived,” says senior author Ali Ellebedy, associate professor of pathology and immunology, of medicine, and of molecular microbiology at Washington University in St. Louis.
“But that’s a misinterpretation of the data. It’s normal for antibody levels to go down after acute infection, but they don’t go down to zero; they plateau. Here, we found antibody-producing cells in people 11 months after first symptoms. These cells will live and produce antibodies for the rest of people’s lives. That’s strong evidence for long-lasting immuni