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What is coronavirus and what is COVID-19?

Coronavirus are a group of viruses that cause different respiratory diseases. It took the name of coronavirus for the structure of the virus, which resembles a crown and the fact that it is on the surface of it.  These viruses usually sicken animals and can cause disease to people.  It can be divided into subtypes:  alfa (α), beta(β), beta gama (γ) and delta (δ).  The two coronaviruses that sicken people are alfa and beta.

During December 2019 an outbreak in the city of Wuhan, China presented itself.  In the first fifty days of the epidemic it infected more than seventy thousand people and took the lives of more than 1800 people.  This virus was catalogued as coronavirus group β and was named after Wuhan or new coronavirus 2019 (2019-nCov).3

References:
  1. Shereen MA, Khan S, Kazmi A, Bashir N, Siddique R. COVID-19 infection: Origin, transmission, and characteristics of human coronaviruses. Journal of Advanced Research 2020;24:91–8. doi:10.1016/j.jare.2020.03.005.
  2. Lupia T, Scabini S, Pinna SM, Perri GD, Rosa FGD, Corcione S. 2019 novel coronavirus (2019-nCoV) outbreak: A new challenge. Journal of Global Antimicrobial Resistance. 2020;21:22–7. doi: 10.1016/j.jgar.2020.02.021.
  3. Sun J, He W-T, Wang L, Lai A, Ji X, Zhai X, et al. COVID-19: Epidemiology, Evolution, and Cross-Disciplinary Perspectives. Trends in Molecular Medicine 2020. doi:10.1016/j.molmed.2020.02.008