One quarter of the world is now following the example set in Wuhan and Hubei province and locking down their populations; what has Hong Kong learned from the last two months of social distancing, home schooling and quarantine? Hear from Dr Ben Cowling, epidemiologist for the School of Public Health at Hong Kong University; Dr Manimala Dharmangadan, Covid-9 intensive care unit, Princess Mary Hospital; SCMP journalists Cissy Zhou and Elaine Ly on returning to mandatory quarantine from the US and…