Top U.S. infectious disease official Anthony Fauci on Feb. 23 told CNN that he expects the U.S. Centers for Disease Control and Prevention to soon relax some Covid-19 recommendations aimed at curbing its spread for people who have been vaccinated.

The United States on Feb. 22 crossed the staggering milestone of 500,000 Covid-19 deaths just over a year since the coronavirus pandemic claimed its first known victim in Santa Clara County, California.

U.S. President Joe Biden secured a commitment from Pfizer Inc. to double the Covid-19 vaccine the company churns out in the coming weeks, putting his goal to fill the country’s inoculation stockpile by summer in sight.

Pfizer Inc. and BioNTech SE started an international study with 4,000 volunteers to evaluate the safety and effectiveness of their COVID-19 vaccine in healthy pregnant women.

Mask-wearing and social distancing will be paramount at the Super Bowl LV, top U.S. infectious disease specialist Anthony Fauci said ahead of the National Football League’s (NFL) championship game on Feb. 7 in Tampa, Florida.

Laboratory testing found that Regeneron Pharmaceuticals Inc.’s Covid-19 antibody cocktail can combat a coronavirus variant first found in South Africa, but a similar drug from Eli Lilly and Co. is inactive against it, according to a study.

The U.S. Centers for Disease Control and Prevention is stepping up efforts to track coronavirus mutations and keep vaccines and treatments effective against new variants until collective immunity is reached, the agency’s chief said.

U.S. public health officials said a second Covid-19 shot could be administered as much as six weeks apart from the first one in situations where it was not possible to get a booster dose immediately.

The United States under President Joe Biden intends to join the COVAX vaccine facility that aims to deliver coronavirus vaccines to poor countries, his chief medical adviser, Anthony Fauci, told the World Health Organization (WHO).

Pfizer Chief Executive Officer Albert Bourla said his company supports Joe Biden’s $1.9 trillion coronavirus-focused plan that is intended to boost vaccination efforts and address the pandemic.