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 outbreak of coronavirus infections, including COVID-19 vaccine breakthrough infections, is associated with large public gatherings, including one in Barnstable County, Massachusetts, according to ...

New evidence showing the delta variant is as contagious as chickenpox and may be more dangerous than other versions has prompted U.S. health officials to consider changing advice on how the nation ...

For many people, the COVID-19 pandemic feels like a distant memory. In reality, the SARS‑CoV‑2 coronavirus is still spreading widely across the globe and continues to evolve into new variants.