As of March 18, Wuhan, along with the rest of China has not had any new cases, raising questions of the potential consequences when social distancing requirements start to be lifted. Estimates are that less than 1% in China have had the disease, leaving more than 99% vulnerable to future waves of infection. With SARS in 2003, there was no transmission to others during incubation and the early symptoms. With COVID-19, there is evidence of early transmission. Ben Cowling, professor of epidemiology at Hong Kong University, said, “This coronavirus is more comparable to influenza.” It is not known how and if Covid-19 may resurface, though some fear it could follow a similar path to the 1918-1919 flu pandemic in which the second and third waves were more deadly than the first.