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  1. New COVID variant 'Stratus' spreading in US: symptoms, what to …

    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.

  2. VARIANT Definition & Meaning - Merriam-Webster

    The meaning of VARIANT is manifesting variety, deviation, or disagreement. How to use variant in a sentence.

  3. What to Know About COVID Variant XFG Stratus

    Sep 18, 2025 · The latest COVID-19 variant known as XFG, nicknamed Stratus, continues to spread throughout the United States, driving a summer spike in cases.

  4. Variants of SARS-CoV-2 - Wikipedia

    The term variant of concern (VOC) for SARS-CoV-2, which causes COVID-19, is a category used for variants of the virus where mutations in their spike protein receptor binding domain (RBD) …

  5. New 'Stratus' COVID Variant Dominant in US: Know These …

    Aug 13, 2025 · COVID-19 cases are rising across U.S. as the country faces a late summer wave driven by the new XFG variant, aka "Stratus." Here's what to know about symptoms and …

  6. COVID-19 variants: What's the concern? - Mayo Clinic

    Oct 24, 2025 · If a mutation changes how a virus acts in a group of people, it's called a variant. Scientists across the world track the changes in the virus variants that cause COVID-19.

  7. Variants and Genomic Surveillance | COVID-19 | CDC

    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 …

  8. COVID-19 variants | WHO COVID-19 dashboard - datadot

    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 …

  9. CDC's Role in Tracking Variants | COVID-19 | CDC

    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 …

  10. New type of flu: What to know about new K variant - The Hill

    Nov 30, 2025 · As we get deeper into flu season, a new type of the influenza virus has been identified, the Centers for Disease Control and Prevention confirms.