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 ...

Public health officials are monitoring a new strain of COVID-19, now called cicada because of its long incubation period. The BA.3.2 variant was identified in South Africa in November 2024, according ...