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After focusing on antibody responses that seem to fade in time, some studies have been looking at T cell immunity and memory. Daniel Altmann and Rosemary Boyton from the Imperial College in London just published an article summarising some key lessons from recent T cell studies. Their aim is to better understand the T cell specificity, function, durability and role in protection in asymptomatic, mild and severe COVID19 cases. It appears that a majority of patients presents correlated antibody and T cell responses and that often more severe cases show a larger response. A lot of questions remain to fully understand T cell immunology and get an accurate picture of the population level immunity.

Link : https://immunology.sciencemag.org/content/5/49/eabd6160