COVID-19 virus is a Betacoronavirus, related to the viruses that cause SARS and MERS
COVID-19 is the name of the disease caused by the COVID-19 virus, also known as SARS-CoV-2 virus
Transmission occurs via respiratory droplets, or aerosols during aerosol generating procedures. It is unclear how easily the virus spreads through contact with surfaces or objects. Fecal shedding has been identified but fecal-oral spread is not a driver of transmission
Incubation period is 5-6 days (median), but ranges from 1-14 days
A person may be infectious for up to 3 days before showing symptoms. Viral RNA levels appear to be highest just before or soon after symptom onset.
Concomitant viral or bacterial pathogens at presentation have not been widely described. Secondary bacterial infection can occur, particularly in those receiving mechanical ventilation