Global health officials have advised against the bans.
The WHO has actually warned that closing borders could accelerate the spread of the virus, if travellers enter countries unofficially.
"Travel restrictions can cause more harm than good by hindering info-sharing, medical supply chains and harming economies," the head of the WHO, Dr Tedros Adhanom Ghebreyesus, said last week.
The WHO instead recommends introducing screening at border crossings.
https://www.bbc.co.uk/news/world-asia-china-51353279