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 ...

After the Centers for Disease Control and Prevention (CDC) recommended loosening safety measures in May, their new recommendation to return to masking in public indoor settings may feel like a ...

Moderna on Tuesday released preliminary data indicating its vaccine is likely to hold up against several variants of concern, including the Delta variant, which is predicted to become the dominant ...