Abstract:Methods: Twenty-two French nursing homes were included. COVID-19 had
been diagnosed with real-time reverse-transcriptase polymerase chain
reaction (RT-PCR) for SARS-CoV-2. Blood S-protein IgG and nucleocapsid
(N) IgG protein (N-protein IgG) were measured 21-24 days after the first
jab (1,004 residents) and 6 weeks after the second (820 residents).
Results: Among the 735 residents without prior COVID-19, 41.7% remained
seronegative for S-protein IgG after the first jab vs 2.1% of the 270
residents with a previo… Show more
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