Severe acute respiratory syndrome (SARS)-CoV, as well as Middle Eastern respiratory syndrome (MERS) and SARS CoV 2 (SARS-CoV-2), belong to the family of Coronaviridae. All these three viruses are pathogenic and cause respiratory problems in humans. In December 2019, several unexpected cases of pneumonia were observed in China.
The government and health researchers in that country pursued strategies to control the virus's outbreak and programmed an etiological study. Finlay, the World Health Organization (WHO) announced that SARS-CoV-2 would cause coronavirus disease in 2019 (COVID-19).
The incubation period of COVID-19 is estimated to be 1 to 14 days. The lung is the main organ affected by COVID-19. However, in severe cases, other parts of the body, such as the central nervous system (CNS), kidney, liver, heart, stomach, and intestines may also be affected. As with many other respiratory diseases, the severity of the infection caused by SARS-CoV-2 can vary from patient to patient.
Recent evidence suggests that some SARS-CoV-2 infection cases have been associated with pneumonia and respiratory distress, while other patients diagnosed with SARS-CoV-2 have experienced respiratory failure, septic shock, or multi-organ failure. The mortality rate of infection is reported to be about 2%. The infection of other people during the incubation period and an acute symptom-free phase of the disease is possible.