Also, this fails to take into account that quarantining cities already has a long precedent. In 2014, the city of Yumen in China was put into lockdown after a man there died of the bubonic plague. During the SARS outbreak in 2003, while they didn't quarantine a whole city, Canada quarantined over 30,000 people in Toronto, even though they only had 250 probable cases of the virus. The experts don't believe that strict and enforced large-scale quarantines are the best way to deal with outbreaks, but also they really can't stop a country from doing them.