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Yale Medicine School: Why are Some COVID-19 Cases More Severe? 'Humanized' Mice Offer a Clue
December 18, 2021
NEW HAVEN, Connecticut, Dec. 18 (TNSJou) -- Yale School of Medicine issued the following news:

Why do 80 to 90% of people infected with COVID-19 experience only mild cases while 10 to 20% face more severe or life-threatening symptoms?

Researchers in the lab of Yale's Richard Flavell decided to pose this question to a mouse, or rather to mice they have engineered to possess human-like immune systems.

These "humanized mice" revealed that the ca . . .

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