Caption Colorized scanning electron micrograph of a cell infected with the Omicron strain of SARS-CoV-2 virus particles (pink), isolated from a patient sample. Image captured at the NIAID ...

Health insurers use AI to deny certain claims and maximize their profits, a Senate report suggests. Hospitals around the country are struggling to fight back.

Getty Images Early data suggests Omicron leads to fewer hospital admissions ... and those discovered to have the virus after being admitted for something else, says Prof Helen Rees at the ...

The XEC COVID-19 variant is poised to become the dominant variant worldwide. Now is a good time to get an updated COVID ...

When it eventually emerged from its host, the virus had a startling range of new abilities — finding new ways to invade cells, weaken the immune system and evade antibodies. What is the omicron ...

This scanning electron microscope image shows SARS-CoV-2 (yellow)—also known as 2019-nCoV, the virus that causes COVID ...

Mutations in the spike proteins allow the virus to bypass antibodies you have from previous infection or vaccination. The Omicron variant has 26 spike protein mutations, allowing for more ...

Getty Images Early in the pandemic, that didn't seem to be the case with Covid. Fewer than 1% of all cases recorded in the UK before November 2021 were reinfections. But Omicron's different ...

XEC is an Omicron variant and has several spike mutations, which is what the virus uses to infect you—and because of those mutations, it might be more infectious than previous strains.

A new variant of COVID called XEC — a combination of two Omicron subvariants — is spreading in the middle of flu season.

COVID-19 survivors may develop autoimmune conditions long-term, with risks varying by severity and vaccination status, ...

Caption Colorized scanning electron micrograph of a cell (purple) infected with the Omicron strain of SARS-CoV-2 virus particles (green), isolated from an individual. Image captured at the NIAID ...