COVID-19 cases are rising in half of U.S. states. What to know about COVID trends and the new Stratus and Nimbus variants.

A significant COVID-19 surge is sweeping across 25 US states, driven by waning immunity and new variants like NB.1.8.1 ...

COVID-19 levels in Bloomington are currently high and on an upward trend, signaling what many public health experts believe ...

COVID-19 cases in California show a potential summer surge, with wastewater data indicating increased virus levels.

A summer wave of Covid-19 is hitting parts of the US, driven by the Nimbus variant. Here's what to know about symptoms, its spread, and how to stay safe.

According to a Johns Hopkins report, several virological, behavioural, and environmental factors drive summer Covid-19 waves.

It may be summer, but COVID-19 is surging in the San Francisco Bay Area.

The Nimbus variant is now the most common strain of COVID currently spreading across the nation, according to the CDC.

Infections of COVID-19 are growing or likely growing in half of the U.S. as of July 8, according to CDC estimates.

A summer wave also could occur in the United States. According to the US Centers for Disease Control and Prevention, NB.1.8.1 already represents about one-third of new Covid-19 cases as of June 7.

Infections of COVID-19 are growing or likely growing in half of the U.S. as of July 8, according to CDC estimates.

There is an increase in positive COVID-19 cases across the Bay Area, especially in San Francisco. UCSF's Dr. Monica Ghandi says it's because two new subvariants have come up this season. "The problem ...