The head of the U.S. Centers for Disease Control and Prevention said on Feb. 26 that a recent decline in COVID-19 cases may be stalling, a development she described as concerning while urging that safeguards to fight the virus remain in place.

SARS-CoV-2 continues to mutate while spreading around the world – infecting more than 112.7 million people as of Feb. 25, according to the Johns Hopkins University of Medicine Covid-19 Dashboard – as companies such as Pfizer and Moderna evaluate boosters against new variants of the virus.

The United States expects to roll out 3 to 4 million doses of Johnson & Johnson’s Covid-19 vaccine during the first week of March, pending authorization from the Food and Drug Administration, White House Covid-19 response coordinator Jeff Zients said on Feb. 24.

Deaths from Covid-19 in the United States fell for a third straight week during the week ended Feb. 21, as cases and hospitalizations showed steep drops.

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.

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.

Australia’s second most populous state Victoria entered a five-day lockdown on Feb. 13 as authorities raced to prevent a third wave of Covid-19 cases sparked by the highly infections UK variant.

All the Covid-causing virus circulating in the world could easily fit inside a single cola can, according to a calculation by a British mathematician whose sum exposes just how much devastation is caused by minuscule viral particles.

The United States reported a 25% drop in new cases of Covid-19 to about 825,000 during the week ended Feb. 7, the biggest fall since the pandemic started, although health officials said they were worried new variants of the virus could slow or reverse this progress.

New cases of Covid-19 in the United States fell for a third week in a row, the first time the country saw such an extended decline since last September, though more than a million people are still being infected every week.