New research is showing why a larger percentage of menโ€”particularly bald menโ€”are having worse Covid-19 outcomes than women.

Researchers at Brown University point to androgens, the group of hormones which causes hair loss in men. Theyโ€™ve determined androgens are linked to severe cases of Covid-19 and suggest their discovery could be called the โ€œGabrin Sign,โ€ named for the first U.S. physician to die of Covid-19 in the United States. Dr. Frank Gabrin was bald.