Current Update of Severe Acute Respiratory Syndrome Coronavirus 2

Coronaviruses are group viruses belong to Corona viridae family the order Nidovirales, and the genus Coronavirus. They are the largest group of viruses causing respiratory infections. There are four genera under this family; Alpha coronavirus, Beta coronavirus, Gamma coronavirus, and Delta coronavirus. However, most of the human coronaviruses produce mild illness in the upper respiratory tract while some strains are lethal and can cause severe acute respiratory syndrome (SARS), middle East respiratory syndrome (MERS) and coronavirus disease 2019 (COVID-19).