Aug 28, 2025 · Some variants will emerge and disappear, while others will emerge and continue to spread and may replace previous variants. It is important to track the emergence of variants …

Dec 2, 2024 · When these changes become significantly different to a previously detected virus, these new virus types are known as “variants.” To identify variants, scientists map the genetic …

Aug 25, 2025 · Confirmed COVID-19 cases are up week-over-week, according to CDC data. Here's what to know the week of Aug. 25.

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.

Oct 12, 2025 · A strain is when a virus has so many variants that it starts acting differently—for example, it’s much more transmissible than the previous version. All strains are variants, but …

Oct 24, 2025 · Concern over variants, sometimes called strains, of the virus that causes COVID-19 is based on how the virus might change. A virus could get better at infecting people, spread …

Jun 18, 2025 · Here, you can find out what mutations define a variant, what impact they might have (with links to papers and resources), where variants are found, and see the variants in …

Feb 13, 2025 · Discover the dominant COVID variants in 2024, XBB.1.5, nicknamed Kraken, and XBB 1.16, nicknamed Arcturus, their symptoms and who is at risk.

For SARS-CoV-2, the emergence of various variants has significantly impacted its fitness, influencing factors such as transmissibility, infectivity, and immune evasion. This section …

Sep 18, 2025 · Are they similar or different from other COVID variants? A sore throat seems to be the predominant symptom, but overall, Stratus symptoms are not any different than those of …