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 so that …

As of 25 June 2025, the variants of interest as specified by the World Health Organization are JN.1, and the variants under monitoring are KP.3, KP.3.1.1, JN.1.18, LP.8.1, NB.1.8.1, XEC and XFG.

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 material of …

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 Nextstrain builds!

Dec 24, 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.

Nov 29, 2021 · Any change to the viral genetic sequence during this process is known as a mutation, and viruses with new mutations are sometimes called variants. Variants can differ by one or multiple …

3 days ago · As of 2026, COVID-19 is no longer a pandemic but a seasonal virus with new variants and updated vaccines. Learn the latest symptoms, dominant strains like XFG, how vaccines work now, …

Mar 27, 2024 · In late 2020, the emergence of variants that posed an increased risk to global public health prompted WHO to characterize some as variants of interest (VOIs) and variants of concern …

Sep 4, 2025 · Scientists at CDC conduct detailed analyses of the sequence data to identify variants and actively monitor which variants are most common in the U.S. These data are used to evaluate …

Nov 20, 2023 · 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 material of …