NIH: Finding Antibodies that Neutralize SARS-CoV-2

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Finding Antibodies that Neutralize SARS-CoV-2

NIH Director’s Blog/Dr. Francis Collins

It’s now clear that nearly everyone who recovers from coronavirus disease 2019 (COVID-19) produces antibodies that specifically target SARS-CoV-2, the novel coronavirus that causes the infection. Yet many critical questions remain. A major one is: just how well do those particular antibodies neutralize the virus to fight off the infection and help someone recover from COVID-19? Fortunately, most people get better—but should the typical antibody response take the credit?

A new NIH-funded study of nearly 150 people who recovered from COVID-19 offers some essential insight. The study, published in the journal Nature, shows that most people, in fact, do produce antibodies that can effectively neutralize SARS-CoV-2. But there is a catch: 99 percent of the study’s participants didn’t make enough neutralizing antibodies to mount an ideal immune response.

The good news is that when researchers looked at individuals who mounted a strong immune response, they were able to identify three antibodies (depicted above) that were extremely effective at neutralizing SARS-CoV-2. By mass-producing copies of these antibodies as so-called monoclonal antibodies, the researchers can now better evaluate their potential as treatments to help people who don’t make strongly neutralizing antibodies, or not enough of them.

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