
“What Do We Know About T-Cells and COVID-19 Immunity?”
from SciShow, narrated by Hank Green.
The speaker explains that T-cell “immunity” refers to
the T-cell response, in directing memory B cells to make antibodies to a virus
similar to ones it has seen, and killing infected cells. It does not make one immune to COVID by itself.
He notes a rather disturbing observations: strong T-cell response in females correlates
with a worse outcome, but in some men it has resulted in cytokine storms.
However, we’ve noticed that outdoor protesters (who use
masks sometimes but shout a lot) don’t seem to be getting severe COVID, and neither
do the journalists who cover them (male or female).
And there are numerous reports of severe illness even
in young women. What seems to be a common denominator may be size of exposure,
in a prolonged indoor event or in a large household.
Wikipedia embed: 3-D rendering of a T-cell, click for attribution
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