Differing strains of the coronavirus continue to appear around the world and a new COVID-19 variant, the so-called "Delta" variant, has health experts concerned. The variant, otherwise known as B.1617 ...

The delta variant is fueling the COVID-19 surge in the United States, but experts warn that a more dangerous variant could emerge if more Americans don't get vaccinated. Delta is the most recent of ...

As summer comes to an end, COVID-19 cases are on the rise again in California. While respiratory viruses usually peak in the winter, the novel coronavirus can also surge in the warmer months.

COVID-19 viral activity was high in the United States during the first week of September, according to fresh data from the Centers for Disease Control and Prevention. Some regions of the United States ...

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 ...

COVID-19 is still a serious threat for a lot of people with compromised immune systems and pre-existing conditions that can cause complications—and now, a new variant, complete with new COVID symptoms ...

The Stratus COVID-19 variant has been fueling a rise in cases across the country. Stratus is currently the dominant variant in the U.S. This variant is slightly more infectious than previous variants.