If each person infected with the Wuhan coronavirus infects two to three others, that may be enough to sustain and accelerate an outbreak, if nothing is done to reduce it. If 5 people with Wuhan coronavirus each infected 2.6 others ... ... there could be 5 sick after 1 generation . Estimates of case-fatality rates can vary, and numbers for the Wuhan coronavirus are preliminary estimates. Officials at the U.S. Centers for Disease Control and Prevention estimate that the Wuhan coronavirus has an incubation period of 2 to 14 days. declared the Wuhan coronavirus outbreak a global health emergency, acknowledging that the disease represents a risk beyond China.

Source: New York Times January 31, 2020 10:01 UTC