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  2. SARS-CoV-2 - Wikipedia

    SARS‑CoV‑2 is a virus of the species severe acute respiratory syndrome–related coronavirus (SARSr-CoV), related to the SARS-CoV-1 virus that caused the 2002–2004 SARS outbreak. [2] [16] Despite its close relation to SARS-CoV-1, its closest relatives, with which it forms a sister group, are the derived SARS viruses BANAL-52 and RaTG13. [17]

  3. SARS-CoV-2 Variant Classifications and Definitions

    SARS-CoV-2 genetic lineages in the United States are routinely monitored through epidemiological investigations, virus genetic sequence-based surveillance, and laboratory studies. On November 30, 2021, the U.S. government SARS-CoV-2 Interagency Group (SIG) classified Omicron as a Variant of Concern (VOC).

  4. SARS-CoV-2 Testing | COVID-19 Treatment Guidelines

    SARS-CoV-2 reinfection has been reported in people after an initial diagnosis of the infection; therefore, clinicians should consider using a NAAT for those who have recovered from a previous infection and who present with symptoms that are compatible with SARS-CoV-2 infection if there is no alternative diagnosis ( BIII ).

  5. Scientific Brief: SARS-CoV-2 Transmission | CDC

    SARS-CoV-2 is transmitted by exposure to infectious respiratory fluids The risk of SARS-CoV-2 infection varies according to the amount of virus to which a person is exposed Transmission of SARS-CoV-2 from inhalation virus in the air farther than six feet from an infectious source can occur Prevention of COVID-19 transmission References

  6. Definition of SARS-CoV-2 - University of North Carolina at ...

    SARS-CoV-2 The virus that causes a respiratory disease called coronavirus disease 19 (see definition COVID-19). SARS-CoV-2 is part of a larger family of viruses called coronaviruses, including SARS-CoV, which led to an epidemic that affected 26 countries and resulted in more than 8000 cases in 2003. RELATED FAQ:

  7. SARS-CoV-2 pathogenesis - PubMed

    We describe how SARS-CoV-2 may infect the lower respiratory tract and cause alveolar damage as a result of dysfunctional immune responses. We discuss how this may lead to the induction of a 'leaky state' of both the epithelium and the endothelium, promoting inflammation and coagulation, while an influx of immune cells leads to overexuberant ...

  8. Variants of SARS-CoV-2 - Wikipedia

    There are many variants of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the virus that causes coronavirus disease 2019 (COVID-19). Some are believed, or have been stated, to be of particular importance due to their potential for increased transmissibility, [1] increased virulence, or reduced effectiveness of vaccines against them.