COVID-19 Natural Immunity on Par with Vaccine Immunity According to Recent Meta-Analysis

COVID-19 Natural Immunity on Par with Vaccine Immunity According to Recent Meta-Analysis

Researchers from the University of California, Los Angeles, (USC) University of Southern California (USC), and the Cleveland Clinic conducted a meta-analysis of studies probing the risk associated with SARS-CoV-2 reinfection among those previously infected with SARS-CoV-2. Searching scientific publications on PubMed and the preprint server medRxiv from the pandemic start until August 18, 2021, the investigators pinpointed studies on a range of established criteria helping to identify for a comprehensive overview of findings. Using broad enough terms to include all relevant studies, the researchers excluded studies that failed to describe cohorts with estimates involving the risk of COVID-19 infection among previously infected persons. With a number of acknowledged limitations, the authors declared that based on the findings, natural immunity associated with SARS-CoV-2 infection is relevant and significant. They declared, “The protective effect of prior SARS-CoV-2 infection on re-infection is high and similar to the protective effect on vaccination.” Obviously more evidence—meaning additional studies—is necessary to better understand, systematically, the duration of protection and ...

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