If we take all the information we have at the moment, the case for a causal link is quite strong, we should now say that Zika is guilty until proven innocent. Christopher Dye More Quotes by Christopher Dye More Quotes From Christopher Dye The number of confirmed cases in China by day 50 (February 19) of the epidemic, was around 30,000, our analysis suggests that without the Wuhan travel ban and the national emergency response there would have been more than 700,000 confirmed COVID-19 cases outside of Wuhan by that date. Chinas control measures appear to have worked by successfully breaking the chain of transmission -- preventing contact between infectious and susceptible people. Christopher Dye