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Ars Technica

How Long Does COVID Immunity Last?

As time passes, we learn more every day about the long term effects of COVID-19. One promising sign is that re-infection rates are very low, which could also indicate that successful vaccines could impart at least a year-long resistance to the virus.

Recent small-scale studies have suggested that the immune memory against the SARS-CoV-2 virus is still active, even a year after infection. The studies tested T and B cells from patients who had COVID early in the pandemic, and both found positive immune responses still active in the patients' samples. 

Although these studies were small, and larger data sets are needed, the findings do suggest some long-term immunity to COVID-19 - which is a positive indication for vaccines as well. Head over to Ars Technica for more.