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Severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2) is a strain of coronavirus that causes COVID-19, the respiratory illness responsible for the COVID-19 pandemic. The virus previously had the provisional name 2019 novel coronavirus (2019-nCoV), and has also been called human coronavirus 2019 (HCoV-19 or hCoV-19).
Variants of SARS-CoV-2, the virus that causes COVID-19, have been reported in many countries around the world. Learn more about the current variants of concern. CDC provides credible COVID-19 health information to the U.S.
Oct 6, 2020 · In this Review, we describe the basic virology of SARS-CoV-2, including genomic characteristics and receptor use, highlighting its key difference from previously known coronaviruses.
Mar 27, 2024 · COVID-19, also called coronavirus disease 2019, is an illness caused by a virus. The virus is called severe acute respiratory syndrome coronavirus 2, or more commonly, SARS-CoV-2. It started spreading at the end of 2019 and became a pandemic disease in 2020.
Nov 20, 2023 · What are variants of SARS-COV-2, the virus that causes COVID-19? It is usual for viruses to change and evolve as they spread between people over time. When these changes become significantly different to a previously detected virus, these new virus types are known as “variants.”
3 days ago · A human SARS-CoV-2 challenge study in individuals without previous exposure to the virus or vaccines provides detailed profiles of local and systemic epithelial and immune cell response dynamics ...
Mar 18, 2024 · Find an overview for healthcare workers of SARS-CoV-2 testing, considerations for testing, test types, surveillance, and how to interpret test results.
