There’s pretty much no one left in the US who hasn’t been exposed to the coronavirus, whether by vaccination, infection or both.
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Your blood can hold a record of past illnesses. That information can reveal how many people have had a certain infection – like 58% of Americans having had COVID-19 by the end of February 2022.
Your body can be infected and fight off SARS-CoV-2 without your ever noticing.
After your body fights off an infection, antibodies remain in your blood. Two researchers explain how tests identify these antibodies and what the data can be used for.
Top contributors
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Postdoctoral Scholar in Medicine, University of California, San Francisco
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Professor of Public Health, University of Michigan
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Professor of Biology, the Emerging Pathogens Institute, University of Florida
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Assistant Professor of Biostatistics, University of Florida
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Professor of Medicine, University of Virginia
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Postdoctoral Fellow in Microbiology, Icahn School of Medicine at Mount Sinai