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Dr. Boarhead’s Summary of Global Updates on the 2019 Novel Coronavirus: 6th September 2020 1. medRxiv: Of 518 residents and staff at six London care homes, 86.3% surviving residents and 73.2% staff underwent serological testing. Almost all SARS-CoV-2 RT-PCR positive residents and staff were antibody positive five weeks later. Symptomatic but SARS-CoV-2 RT-PCR negative residents and staff had high seropositivity rates, as did asymptomatic RT-PCR negative individuals. Neutralizing antibodies were present in 89.4% seropositive individuals and not associated with age or symptom. < 12 Aug.> [key info] Even old people can develop potent antibodies. [link] https://www.medrxiv.org/content/10.1101/2020.08.10.20171413v1 2. New England Journal of Medicine : Researchers measured the levels of SARS-CoV-2 antibodies in the blood of roughly 30,000 people in Iceland, including more than
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