Immunity may last days to years, reports SARS-CoV-2 study

Lancet paper shows there are five types of immune response to the virus, and concludes annual vaccination may be necessary

Antibodies against SARS-CoV-2 are likely to wane at different rates depending on the severity of the infection, with some patients having immunity for a few days and others years, new research suggests.

The researchers followed 164 COVID-19 patients for up to nine months after infection.

They identified five distinct groups based on patterns of neutralising antibodies.

1. Negative group of patients who do not develop neutralising antibodies at the 30% inhibition level (12% of