Excerpts from Books and Wikipedia
"If the Food and Drug Administration authorizes the drug, which could happen within days, then patients might begin receiving it by the end of the year. Although supply will be limited at first, public health experts are hopeful that the pills might curb the worst outcomes from the disease, no matter the variant. Pfizer said its antiviral pill was found to reduce the risk of hospitalization and death by 88 percent when given to unvaccinated people at high risk of severe Covid within five days of the onset of symptoms. The company also said that laboratory experiments indicated that the drug will attack a key protein in the Omicron variant, which is surging in South Africa and Europe and is expected to dominate U.S. cases in the weeks ahead. [New York Times, Dec. 14, 2021]