Mayor Bill de Blasio’s chief medical adviser on Feb. 25 downplayed the results of two studies suggesting that a new coronavirus variant found in New York City in November will be more resistant to vaccines now being administered.

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.

A Covid-19 vaccine candidate developed by Sanofi and U.S. group Translate Bio “will not be ready this year,” the French drugmaker’s chief executive told Le Journal du Dimanche newspaper.

Mexico surpassed India in confirmed Covid-19 deaths on Jan. 29, giving the Latin American country the third-highest toll worldwide, according to a Reuters tally of official data.

Severe Covid-19 infections are beginning to abate in many parts of the United States even as the death toll mounts, signaling an end to the pandemic’s post-holiday surge and prompting some states to ease public health restrictions.

Global coronavirus cases surpassed 100 million on Jan. 27, according to a Reuters tally, as countries around the world struggle with new virus variants and vaccine shortfalls.

China on Jan. 23 reported a slight increase in new cases of Covid-19 as the country marked the anniversary of the world’s first coronavirus lockdown, in the city of Wuhan where the disease emerged in late 2019.

The U.S. coronavirus death toll topped 400,000 on Jan. 19, according to a Reuters tally, as the country hardest hit by the pandemic struggled to meet the demand for vaccines to stem the spread of infection.

The worldwide coronavirus death toll surpassed 2 million on Jan. 15, according to a Reuters tally, as nations around the world are trying to procure multiple vaccines and detect new Covid-19 variants.

More than 10 million Americans had received their first dose of a Covid-19 vaccine as of Jan. 13, according to the U.S. Centers for Disease Control and Prevention, as the year-old pandemic roared on unchecked.