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Etymology 1
Clipping of.

Noun

 * 1) A coronavirus, especially SARS-CoV-2
 * 2) COVID-19, the disease caused by SARS-CoV-2
 * 1) COVID-19, the disease caused by SARS-CoV-2

Etymology 2
From.

Noun

 * 1)  a corona; a circle or set of circles visible around a bright celestial object