Natural Immunity to COVID-19 Detected at 20 Months After Infection: Study

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Protection against the virus that causes COVID-19 among the recovered was detected by researchers at 20 months post-infection, adding to the body of evidence that such protection, known as natural immunity, is long-lasting.

Researchers found antibodies against the SARS-CoV-2 spike protein receptor-binding domain (RBD) in 99 percent of study participants who tested positive for COVID-19, with some having had the illness as long as 20 months prior.

SARS-CoV-2 is another name for the CCP (Chinese Communist Party) virus, which causes COVID-19. Antibodies are a form of protection against the virus.

The researchers, led by Dr. Dorry Segev, the director of the Epidemiology Research Group in Organ Transplantation at Johns Hopkins University, put out a call for unvaccinated, healthy adults in the fall of 2021 and divided them into three groups. The first group consisted of 295 participants who had test-confirmed COVID-19 infections in the past; the second consisted of 275 participants who believed they recovered from COVID-19 but did not get a test; the third consisted of 246 people who did not think they ever had COVID-19 and had never tested positive.

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