The United States reported a 23% drop in new cases of Covid-19 and a 16% fall in the number of people hospitalized with the virus for the week ended Feb. 14, with both figures declining for a fifth week in a row.

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.

The U.S. Centers for Disease Control and Prevention (CDC) said the health protection agency was recommending shorter self-quarantine periods after potential exposure to the coronavirus of seven days with a negative test and 10 days without a test.

The World Health Organization tightened guidelines on wearing face masks, recommending that, where Covid-19 is spreading, they be worn by everyone in health care facilities and for all interactions in poorly ventilated indoor spaces.

The U.S. death toll from Covid-19 surpassed a grim new milestone of 250,000 lives lost as New York City’s public school system – the nation’s largest – called a halt to in-classroom instruction, citing a jump in coronavirus infection rates.

Dr. Anthony Fauci, the top U.S. infectious disease expert, said he has had no contact with President-elect Joe Biden’s coronavirus transition team and sees no reason to quit to join that effort when there is so much to do now to fight the surging pandemic.

The U.S. Centers for Disease Control and Prevention warned that Covid-19 could spread through airborne particles that can remain suspended in the air and travel beyond six feet.

New Jersey and California took a big step toward letting businesses resume their pre-pandemic lives, by allowing restaurants to begin limited indoor dining, as coronavirus cases abated nationwide even as some new hotspots emerged.

A Biogen corporate meeting held in Boston in March that was initially connected to about 100 cases of COVID-19 could have led to a significantly higher number of infections.

Nearly 300,000 Americans could be dead from Covid-19 by Dec. 1, University of Washington health experts forecast, although they said 70,000 lives could be saved if people were scrupulous about wearing masks.