Jun 23, 2025 · A new COVID-19 variant that was unheard of just months ago is now projected to be the second-most common strain in the United States.

Sep 18, 2025 · An infectious disease expert shares information on the Stratus variant, XFG, the newly dominant COVID strain spreading in the United States.

Aug 4, 2025 · A highly transmissible new COVID-19 variant called NB.1.8.1, aka "Nimbus," is now the dominant strain circulating in the United States.

Jun 11, 2025 · The World Health Organization (WHO) is keeping an eye on a new COVID-19 variant called NB.1.8.1, or “Nimbus,” that has spread across Europe, the Americas and the …

Aug 9, 2025 · Variant XFG, also known as “Stratus,” was first detected in Southeast Asia back in January but accounted for very few of cases in the United States until May. But by late June, it …

Aug 27, 2025 · New cases of COVID-19 are increasing nationwide, fueled by the Stratus variant, an emerging offshoot of the Omicron variant. According to the Centers for Disease Control and …

May 27, 2025 · As the Trump administration moves to limit COVID booster vaccines for some, here's what to know about the latest variant NB.1.8.1 and its symptoms.

Aug 28, 2025 · New variants of SARS-CoV-2 are expected to continue to emerge. Some variants will emerge and disappear, while others will emerge and continue to spread and may replace …

Dec 1, 2025 · Get the latest COVID-19 news from infectious diseases expert Mark Rupp, MD, including COVID-19 case rates, types of variants circulating and vaccine updates.

Aug 5, 2025 · A new COVID-19 variant is climbing the ranks in the United States, becoming the third-most common strain of the summer.