COVID-19 severity affected by proportion of antibodies targeting crucial viral protein – Study

A comprehensive study of immune responses to SARS-CoV-2 associates mild disease with comparatively high levels of antibodies that target the viral spike protein. But all antibodies wane within months.

COVID-19 antibodies preferentially target a different part of the virus in mild cases of COVID-19 than they do in severe cases, and wane significantly within several months of infection, according to a new study by researchers at Stanford Medicine

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The findings identify new links between the course of the disease and a patient’s immune response. They also raise concerns about whether people can be re-infected, whether antibody tests to detect prior infection may underestimate the breadth of the pandemic and whether vaccinations may need to be repeated at regular intervals to maintain a protective immune response. 

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