Coronavirus Incubation Period

2-14 Days

Possible: 2-27 Days

The United States CDC estimates the incubation period for COVID-19 to be between 2 and 14 days, however some countries have reported cases with incubation periods of up to 27 days.

Why the incubation period is important

The incubation period of an infectious disease is the time interval between the exposure to a disease‐causing infectious agent and the onset of symptomatic disease. By understanding the incubation period it allows us to be more aware and health authorities to introduce more effective quarantine systems to control and hopefully prevent the spread of the virus.

Incubation period comparison with other viruses

The incubation period of other viruses compared to the coronavirus which is 2-14 days based on the current official estimated range for the coronavirus COVID-19.

VirusIncubation Period (Estimates)Incubation Period (Median)
Seasonal Flu1-4 days2 days
Coronavirus2-14 days or (2-27 days)5.5 days
SARS2-10 days4 days
MERS2-14 days5 days
Swine Flu1-7 days2 days

This date is based on estimates to give a comparison of the coronavirus vs other viruses with the United States CDC estimating the incubation period for COVID-19 to be between 2 and 14 days and the World Health Organization (WHO) reporting an incubation period between 2 and 10 days.