In December 2019, the world was shaken by the discovery of a novel type of pneumonia virus that had not been observed before. The disease was caused by severe acute respiratory syndrome coronavirus 2, and the disease was officially named COVID-19 by the World Health Organization (WHO) in March 2020. Also in that month, the WHO announced that COVID-19 could be categorized as a pandemic.
Author: I.M. Chew
For more about this article see link below.