Antibodies Persist for More Than a Year After COVID-19 Infection, Study Finds

The immune systems of the vast majority of people who have been infected with the CCP virus will continue to carry antibodies against the virus for at least 12 months, according to a peer-reviewed study accepted by the European Journal of Immunology on Sept. 24. Scientists at the Finnish Institute for Health and Welfare studied the presence of antibodies in 1,292 subjects after eight months of infection. They found that 96 percent of the subjects still carried neutralizing antibodies and 66 percent still carried a type of antibody called nucleoprotein IgG. The scientists then investigated antibody levels one year after infection by randomly selecting 367 subjects from the original cohort who had not yet been vaccinated. Eighty-nine percent of the subjects still carried neutralizing antibodies, and 36 percent still carried the IgG antibody. Antibody levels were higher in subjects who experienced severe COVID-19 disease. Compared to those who had mild disease, these …

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