Cases of the novel coronavirus in the United States have surpassed 28.8 million with more than 512,000 deaths.

Food and food packaging are highly unlikely to spread Covid-19, the US Food and Drug Administration, US Department of Agriculture and the Centers for Disease Control and Prevention said in a reminder Thursday.

New coronavirus variants could lead to a rapid rise in Covid-19 cases, and can "dangerously accelerate the trajectory of the pandemic," US health officials warned Wednesday.

Several members of President Joe Biden's former coronavirus advisory board are urging his administration to more widely recommend and mandate the use of N95 masks.

A giant winter storm that's brought ice and plummeting temperatures to a large swath of the country has left more than 5 million people without power, creating another possibly dangerous situation for millions of Americans who don't typically see freezing temperatures.

Millions of customers across the US have lost power, with much of those outages occurring in Texas. Power outages can be dangerous for those unprepared for such intense winter chill.

The US Centers for Disease Control and Prevention is not recommending a Covid-19 testing requirement before domestic air travel, the CDC tells CNN.

About 99% of children in the US live in a county considered a "red" zone with high levels of Covid-19 transmission under new US Centers for Disease Control and Prevention school opening guidance, according to a CNN analysis of federal data.

The Centers for Disease Control and Prevention is investigating a multi-state listeria outbreak linked to fresh and soft cheeses such as queso fresco, queso blanco and queso panela.