COVID vaccines boost antibodies in airways after infection, study says. Why it matters

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The antibody boost was particularly pronounced after people who recovered from COVID-19 got a second dose.

When you’re infected with the coronavirus, your body pumps out special proteins called antibodies that help protect you from getting sick again. They stick around for months or years, slowly diminishing with time.

A laboratory study on about a million human airway cells infected with the coronavirus found that over four days, the virus grew from about 1,000 particles to about 10 million.and — all too often — on to other individuals, especially in crowded, indoor places where people aren’t able to keep their distance,” Dr. Francis Collins, former director of the National Institutes of Health, wrote in a blog post last year.

“Our results demonstrate that to only study blood does not reflect the antibody levels in the respiratory tract, which likely play a major part in neutralising the virus locally,” study co-author Karin Loré, a professor of medicine at the Karolinska Institutet in Sweden, said in the news release. “Completing the vaccination with a second dose may therefore be important for achieving optimal immune responses and reducing the spread of infection between individuals.

 

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