"It's the biggest experiment that's ever happened." In a stunningly short period of time, the delta variant has changed the course of the COVID-19 pandemic by evolving to become more transmissible ...

Symptoms appear to be similar to other COVID variants, the WHO says. Cases of the new COVID-19 variant NB.1.8.1, a descendent of the Omicron variant, are on the rise in some parts of the world, ...

As COVID-19 activity remains high across the United States, a new hybrid variant called XEC is spreading rapidly in Europe and other parts of the world. The XEC variant has been detected in at least ...

While COVID-19 transmission remains low in the US, health experts are anxious about the potential for a big summer wave as two factors seem set for a collision course: a lull in infection activity ...

There is a new COVID-19 variant fueling infections in the U.S. KP.3.1.1 is currently the second most common variant in the country. Experts say the variant may be more infectious than previous ...

A new COVID variant known as the "XEC variant" is raising questions and capturing the attention of researchers heading into the fall and winter season. The variant has been largely spreading overseas ...

Positive cases for the COVID-19 KP.3 variant are rising, according to newly released data by the Centers for Disease Control and Prevention. The KP.3 variant has risen from accounting for 25% of ...

Richard Orton receives funding from the Medical Research Council and the Wellcome Trust Wilhelm Furnon receives funding from the Medical Research Council and the Wellcome Trust. A new COVID variant is ...