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COVID-19  / CORONAVIRUS DISEASE 2019     C oronavirus is the infectious disease caused by the most recently discovered coronavirus . Both the virus and the disease  were unknown before the outbreak began in Wuhan, China in December 2019 according to the World Health Organization. Coronavirus (CoV) are a large family of viruses.  The name  coronavirus  is derived from the Latin  corona , meaning "crown" or "halo", which refers to the characteristic appearance reminiscent of a crown or a solar corona  around the virions  / virus particles when viewed under two-dimensional  transmission electron microscopy  due to the surface covering in club-shaped protein spikes.    HISTORICAL TIMELINE -  This represents the sequence of events on how, where or when the Coronavirus originated and how many cases arise every single time and now the world is being affected, a pandemic.    CAUSATIVE AGENT    Chinese authorities made a preliminary determinatio