The US has done an about-face on its approach to the coronavirus pandemic this week. Masks are back, vaccine mandates are looming, and officials are sounding more worried than they have in months.

Vaccination was shown to lower risk of developing severe COVID-19 in both variants, with the largest difference in risk observed in patients aged 40 to 59 years. Patients infected with the SARS-CoV-2 ...

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 ...

We were unable to process your request. Please try again later. If you continue to have this issue please contact customerservice@slackinc.com. The risk for severe disease or death among U.S. adults ...

WASHINGTON - In a press briefing Friday, the head of the WHO said the delta variant is "quickly becoming the dominant strain in many countries," and thus, the world is in a "very dangerous period" of ...

In a recent study published in Scientific Reports, researchers investigated whether trypsin, a protease, increased severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infectivity. In addition ...

First, many called it simply the coronavirus, then COVID or COVID-19. Now, we are keeping track of descriptors like alpha, beta and gamma, the variants of COVID-19. The World Health Organization ...