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 …

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 …

Positive, negative, and neutral mutations during the evolution of coronaviruses like SARS-CoV-2. Variants of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) are viruses that, while …

Dec 30, 2025 · WASHINGTON (AP) — Flu is rising rapidly across the U.S., driven by a new variant of the virus — and cases are expected to keep growing with holiday travel.

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!

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 faster or …

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 not all variants …

6 days ago · Discover new COVID variant symptoms in 2026, understand respiratory infection risks, and learn effective protection strategies to stay safe and informed.

May 30, 2025 · What is a variant, and where do variants come from? A variant is a subgroup of viruses within a species that share an inherited set of distinctive changes in their genetic code.

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 …