A study in Italy compared two groups of people. Both groups have recovered from COVID-19. One group (n=21) was vaccinated with two doses of the Pfizer-Biontech COVID-19 vaccine, and the other group (n=19) was not. Backgrounder: The SARS-CoV-2 virus has several proteins, including the spike and nucleocapsid protein (NCP). After a COVID-19 infection, antibodies (IgG) to…
Convalescent Antibodies from COVID-19 Last Up to 18 months
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