Some western analysts show surprise at Wuhan's return to normalcy without a vaccine. In response to that, many have cited multiple measures Wuhan took, like a strict lockdown, mask wearing, mass testing and contact tracing. For some comments on this, CGTN talked with Peter Chin-Hong, a professor of medicine and an infectious disease specialist at the University of California. He explained that robust strategy, alignment of science and politics contributed to Wuhan's return to normalcy.