Interesting preprint on T-cell immunity in a large number of #COVID19 patients and controls. T-cell response to #SARSCoV2 was observed in 81% of uninfected individuals. This immune response was caused by prior exposure to 'common cold' coronaviruses.https://t.co/EKXp4EZuXF

— Prof Francois Balloux (@BallouxFrancois) June 28, 2020