The alpha variant has been the most prevalent lineage of the novel coronavirus in the United States since April, but the U.S. Centers for Disease Control and Prevention expects that is no longer the ...

The variant of the COVID-19 virus that was first found in India and is now dubbed delta has become the dominant strain in some areas, and could become the primary variation in the U.S. the World ...

The fast-spreading delta variant of the coronavirus has been gaining traction worldwide since it was first detected in India. It’s a version of the coronavirus that has been found in more than 80 ...

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 ...

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During the Delta wave of COVID-19, higher caseload strain negatively impacted patient survival rates across US hospitals, regardless of their size or resources. The researchers explained that US ...

Some patients "don't think COVID is real," one health care worker told ABC News. Health care workers in southwest Missouri are sounding the alarm over a wave of young, unvaccinated COVID-19 patients ...

"As these viruses continue to evolve, public health officials watch carefully to see whether new strains will be more easily ...