Pfizer Inc. and BioNTech SE said on Jan. 25 they started a clinical trial to test a new version of their vaccine specifically designed to target the COVID-19 Omicron variant, which has eluded some of the protection provided by the original two-dose vaccine regimen.

Early research suggesting that a popular non-psychoactive compound derived from marijuana might help prevent or treat COVID-19 warrants further investigation in rigorous clinical trials, researchers say.

Two cases of a subvariant of the Omicron variant were identified in Washington state. Two cases were also identified in Houston.

Eli Lilly

The U.S. health regulator revised on Jan. 24 the emergency use authorizations for COVID-19 antibody treatments from Regeneron and Eli Lilly to limit their use, as the drugs are unlikely to work against the Omicron coronavirus variant.

A New York judge struck down the state’s mask mandate on Jan. 24, one week before it was due to expire, ruling the governor overstepped her authority in imposing a rule that needed to have been passed by the state legislature.

The Omicron variant can survive longer than earlier versions of the coronavirus on plastic surfaces and human skin, Japanese researchers found in laboratory tests. Additionally, new research shows users of rapid antigen tests to detect COVID-19 should swab their nostrils as directed by the manufacturer and not swab the throat or cheek instead.

A third booster dose of a COVID-19 vaccine made by AstraZeneca, Pfizer-BioNTech or Johnson & Johnson increases antibody levels significantly in those who have previously received two doses of Sinovac’s CoronaVac shot, a study has found.

The head of the World Health Organization (WHO) warned on Jan. 24 that it was dangerous to assume the Omicron variant would herald the end of COVID-19’s acutest phase, exhorting nations to stay focused to beat the pandemic.

At least 1 in 5 Americans have been infected with COVID-19. In other news, the U.S. Food and Drug Administration approved Gilead Sciences’ supplemental New Drug Application for Veklury (remdesivir) for adults and adolescents with COVID-19 who are not hospitalized but are at high risk of progression to severe COVID-19, hospitalization or death.

A fourth dose of COVID-19 vaccine given to people over 60 years in Israel made them three times more resistant to serious illness than thrice-vaccinated people in the same age group, Israel’s Health Ministry said on January 23.