The are with frequent, the family of Coronaviridae, which are responsible for digestive and respiratory infections in humans and animals. The virus owes its name to the appearance of its viral particles, bearing growths that evoke a crown. The , which consist of a covered with an envelope, measure 80 to 150 nm in diameter. Corona Virus
The small spheres contain a ribonucleic (RNA) (with a single chain), linear (non-segmented) and positive, accounting for 27 to 32 . This RNA replicates in the cytoplasm of the infected cell.