The delta coronavirus variant surging across the United States appears to cause more severe illness and spread as easily as chickenpox, according to an internal document from the US Centers for ...

The delta variant has emerged as the dominant strain of the novel coronavirus in the United States, according to updated data from the Centers for Disease Control and Prevention (CDC). The CDC’s ...

Delta deadliest among COVID-19 variants, say CCMB scientists. Five different SARS-CoV-2 variants were chosen and scientists ...

Questions are appearing on social media about how we know there is a rise in certain COVID-19 variants if individual tests cannot detect specific variants. The U.S. Centers of Disease Control and ...

Alexander Tin is a digital reporter for CBS News based in the Washington, D.C. bureau. He covers federal public health agencies. "Looking at cases over the past two months when the Delta variant was ...

The new omicron coronavirus mutant speeding around the world may bring another wave of chaos, threatening to further stretch hospital workers already struggling with a surge of delta cases and upend ...

People should wear masks when indoors in 75 of Iowa's 99 counties — regardless of vaccination status — due to high coronavirus transmission rates, according to guidelines set by the Centers for ...

The COVID-19 delta variant is ripping through Mississippi, quadrupling cases numbers since June and leaving behind a deficit of ICU beds, overflowing emergency rooms and shuttered schools. During a ...