The Next Pandemic: SARS-CoV-2/COVID-19
What is thought to be known about this coronavirus/Wuhan Pneumonia, so far:
The outbreak began in Wuhan, China. Population ~11 million. The city is now under lock down.
According to the CDC the risk to the general American public is considered low at this time.
In it's early stages, a minimum of 500+ people have been infected according to the Chinese government, although many believe this be grossly under reported, and that the true number is in the thousands.
17 dead,
Regarding how SKorea did it, he linked to this video in the second article which explains it.
https://www.bbc.com/news/av/world-asia-51897979/coronavirus-south-korea-seeing-a-stabilising-trend
Regarding Singapore, he linked to this article: https://academic.oup.com/jtm/advance-article/doi/10.1093/jtm/taaa039/5804843
Neither SK or Singapore needed to use lockdowns, so I"m not sure where that statement comes from?
Regarding China, did you not see videos of their lockdown?