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  1. Mar 6, 2023 · Transmission of SARS-CoV-2 occurs primarily through exposure to respiratory droplets. 1 Exposure can occur when individuals inhale droplets or particles that contain the virus (with the greatest risk of transmission occurring within 6 feet of an infectious source) or touch mucous membranes with hands that have been contaminated with the virus.

  2. Sep 15, 2021 · SARS-CoV-2, the virus that causes COVID-19, which was first identified in 2019 What is SARS? SARS is the name of the respiratory illness that’s caused by SARS-CoV. The acronym SARS...

  3. › wiki › COVID-19COVID-19 - Wikipedia

    Frequency. 676,609,955 [4] cases. Deaths. 6,881,955 [4] Coronavirus disease 2019 ( COVID-19) is a contagious disease caused by a virus, the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The first known case was identified in Wuhan, China, in December 2019. [5] The disease quickly spread worldwide, resulting in the COVID-19 ...

  4. Mar 20, 2023 · SARS-CoV-2 infection weakens immune-cell response to vaccination NIH-funded study suggests need to boost CD8+ T cell response after infection. Colorized scanning electron micrograph of a cell (red) infected with the Omicron strain of SARS-CoV-2 virus particles (blue), isolated from a patient sample. NIAID What

  5. Order free tests at Have toolkit questions? Call 1-800-232-0233 (TTY 1-888-720-7489) Some people who have been infected with the virus that causes COVID-19 can experience long-term effects from their infection, known as Long COVID. Learn more.

  6. Oct 6, 2020 · Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a highly transmissible and pathogenic coronavirus that emerged in late 2019 and has caused a pandemic of acute respiratory disease ...

  7. Mar 6, 2023 · SARS-CoV-2 reinfection has been reported in people after an initial diagnosis of 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 ).

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