what is covid 19 ?

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https://coronavirus.dc.gov/page/what-covid-19

What Is COVID-19? | coronavirus
https://coronavirus.dc.gov/page/what-covid-19
COVID-19 is a new strain of coronavirus that has not been previously identified in humans. The COVID-19 is the cause of an outbreak of respiratory illness first detected in Wuhan, Hubei province, China. Since December 2019, cases have been identified in a growing number of countries. The District’s surveillance data can be found here.

https://www.hopkinsmedicine.org/health/conditions-and-diseases/coronavirus

What Is Coronavirus? | Johns Hopkins Medicine
https://www.hopkinsmedicine.org/health/conditions-and-diseases/coronavirus
COVID-19. COVID-19 is the disease caused by SARS-CoV-2, the coronavirus that emerged in December 2019. COVID-19 can be severe, and has caused millions of deaths around the world as well as lasting health problems in some who have survived the illness. The coronavirus can be spread from person to person.

https://www.who.int/health-topics/coronavirus

Coronavirus – WHO
https://www.who.int/health-topics/coronavirus
Coronavirus disease (COVID-19) is an infectious disease caused by a newly discovered coronavirus. Most people infected with the COVID-19 virus will experience mild to moderate respiratory illness and recover without requiring special treatment.

https://www.mayoclinic.org/diseases-conditions/coronavirus/symptoms-causes/syc-20479963

Coronavirus disease 2019 (COVID-19) – Symptoms and causes …
https://www.mayoclinic.org/diseases-conditions/coronavirus/symptoms-causes/syc-20479963
Coronavirus. Coronavirus is a family of viruses that can cause respiratory illnesses such as the common cold, severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS).

https://www.nationalgeographic.com/science/article/coronavirus

What is the coronavirus? – National Geographic
https://www.nationalgeographic.com/science/article/coronavirus
What is the coronavirus? COVID-19, the disease caused by the novel coronavirus, has infected tens of thousands of people worldwide. Here’s what you need to know.

https://www.cnn.com/2020/01/20/health/what-is-coronavirus-explained/index.html

What is coronavirus? COVID-19 explained – CNN
https://www.cnn.com/2020/01/20/health/what-is-coronavirus-explained/index.html
20 janv. 2020Coronavirus symptoms. The viruses can make people sick, usually with a mild to moderate upper respiratory tract illness, similar to a common cold. Coronavirus symptoms include a runny nose, cough …

https://www.health.harvard.edu/diseases-and-conditions/covid-19-basics

COVID-19 basics – Harvard Health
https://www.health.harvard.edu/diseases-and-conditions/covid-19-basics
What is coronavirus? Coronaviruses are an extremely common cause of colds and other upper respiratory infections. SARS-CoV-2, short for severe acute respiratory syndrome coronavirus 2, is the official name for the coronavirus responsible for COVID-19.

https://www.cdc.gov/coronavirus/2019-ncov/faq.html

Coronavirus (COVID-19) frequently asked questions | CDC
https://www.cdc.gov/coronavirus/2019-ncov/faq.html
COVID-19 is a contagious respiratory illness caused by infection with a new coronavirus (called SARS-CoV-2, the virus that causes COVID-19). Seasonal allergies triggered by airborne pollen can lead to seasonal allergic rhinitis, which affects the nose and sinuses, and seasonal allergic conjunctivitis, which affects the eyes.

https://pubmed.ncbi.nlm.nih.gov/32170865/

Coronavirus disease 2019: What we know?
https://pubmed.ncbi.nlm.nih.gov/32170865/
The COVID-19 epidemic is spreading in China and all over the world now. The purpose of this review is primarily to review the pathogen, clinical features, diagnosis, and treatment of COVID-19, but also to comment briefly on the epidemiology and pathology based on the current evidence.

https://www.webmd.com/lung/coronavirus

Coronavirus & COVID-19 Overview: Symptoms, Risks …
https://www.webmd.com/lung/coronavirus
A coronavirus is a common virus that causes an infection in your nose, sinuses, or upper throat. COVID-19 is a novel strain of coronavirus that causes mild flu-like symptoms, but severe cases can …