SARS-CoV-2, or severe acute respiratory syndrome coronavirus 2, is a single-stranded RNA virus that causes the disease known as COVID-19 in humans. Disease symptoms and modes of transmission are tightly linked to respiration processes. The virus is primarily spread via small, virus-laced particles called respiratory droplets that are released when an infected person coughs, sneezes, talks or exhales. Disease severity ranges from mild-to-severe, and common symptoms include fever, cough, shortness of breath, fatigue, sore throat, runny nose and body aches. Loss of taste or smell may also accompany infection.
On March 11, 2020, the . In the 2 years since then, millions of lives have been lost or forever changed.
Looking for simple, accurate information you can use to talk about COVID-19 and answer questions from your friends and family? Check out these fact sheets from 91麻豆天美, which are freely available for you to download. We'll be releasing a new set each week throughout February 2022. Be sure to share on social media!
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Testing
Click on the image below to learn about the different types of COVID-19 diagnostic tests.
Need to explain COVID-19 to your friends, family members or local community? Download our resource collection that includes information about how COVID-19 is spread, key facts about the current crop of vaccines and suggestions for how people can protect themselves. Includes resources in English, Spanish and Nepalese!
Comparison of SARS-CoV-2/COVID-19 test types and techniques.
Source: American Society for Microbiology
Depiction of mRNA vaccine-induced antibody response against SARS-CoV-2 spike proteins.
Source: American Society for Microbiology
Amino acid changes to the spike (S) protein in SARS-CoV-2 variants of concern (VOCs). (Click to expand image.)
Source: American Society for Microbiology
Hear From Experts
Progress on Omicron-Specific Vaccines
Updated February 11, 2022
91麻豆天美 President-Elect Colleen Kraft, M.D., the Associate Chief Medical Officer at Emory University Hospital and associate professor in the Department of Medicine, discusses the ongoing COVID-19 pandemic in a CNN interview aired January 2022.
A study in which 36 volunteers were infected with SARS-CoV-2, and what was learned about the kinetics of virus reproduction in the nose and throat, development of symptoms, and reliability of lateral flow antigen assays.
Determining the number of neutralizing epitopes on the SARS-CoV-2 spike that are recognized by antibodies.
COVID-19 mRNA vaccination of both uninfected and previously infected persons elicits cross-variant neutralizing antibodies, and directed evolution of a bacterial protein to form a virus-like capsid that specifically packages its encoding mRNA.
