Why a Wide Variation in Covid 19 Severity?

Steven Hayward of Power Line does a very good column looking at the question of why some people get very sick (and die) from Covid 19 (corona virus disease 2019) while others experience it seemingly symptom-free (or don't contract it at all?). Many answers have been hypothesized, none is proven as yet.

He devotes the most space to a report from Science concerning multiple studies underway to determine if DNA variations are involved.

"We see huge differences in clinical outcomes and across countries. How much of that is explained by genetic susceptibility is a very open question,” says geneticist Andrea Ganna of the University of Helsinki’s Institute for Molecular Medicine Finland (FIMM).

Italian geneticist Alessandra Renieri of the University of Siena expects at least 11 hospitals in the nation to give ethics approval for her team to collect DNA samples from willing patients. “It is my opinion that [host] genetic differences are a key factor … for susceptibility to severe acute pneumonia.”

To which Hayward sagely adds:

Woe unto the researchers if they find any racial differences emerging from the data.

Because DNA is definitely racist? Or because we choose to ignore science when it conflicts with what is politically correct?