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Singapore study shows that SARS-CoV-2-specific T cells are present in all recovered COVID-19 patients.

These T cells were also found in all subjects who recovered from SARS 17 years ago, and in over 50% of both SARS-CoV-1 and SARS-CoV-2 uninfected individuals tested, suggesting that a level of pre-existing SARS-CoV-2 immunity is present in the general population.

Infection and exposure to coronaviruses induces long-lasting memory T cells, which could help in the management of the current pandemic.