Why aren't countries banning all flights into and out China because of the coronavirus 2019-nCoV? [closed]

Screening doesn't work — BBC reports Coronavirus: Chinese embassy in Paris finds woman who 'cheated' checks

The woman boasted on social media that she had been suffering from a fever, but managed to reduce her symptoms with medicine. She later posted pictures showing herself dining at what she claimed was a Michelin-starred restaurant in Lyon.The embassy has now confirmed that her symptoms are under control. >The woman left Wuhan - where the new coronavrius emerged late last year - before flights were suspended, but when thermal scanning was in place.

5) Airport screening after SARS didn’t catch a single case

I don't believe Wuhan coronavirus: Travel bans for diseases like this don’t work - Vox. First, it just quotes past cases, but past performance doesn't predict future. Second, isn't obvious that lowering Wuhan people means lowering risk. I know banning China flights won't stop every case.