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Two studies find that COVID-19 antibodies last 8 months

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Two studies published yesterday demonstrate that COVID-19 immune responses last as long as 8 months, although the authors focus on different reasons.The first study, published in Science Immunology, followed a small cohort of Australians from day 4 to day 242 after infection.

All patients demonstrated the presence of memory B cells—immune cells that "remember" viral proteins and can trigger rapid production of antibodies when re-exposed to the virus—as long as 8 months after initial infection.The second study investigated antibody responses in 58 confirmed COVID-19 patients in South Korea 8 months after asymptomatic or mild SARS-CoV-2 infection, finding high rates of serum antibodies.

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