I think our leaders are starting to catch up. We are at least now talking of voluntary quarantine for 14 days. Only perhaps about three days after it was discovered that asymptomatic transmission is possible, so we are making progress...
Following from that, we will probably ban travel to/from China a week too late. If we are very, very, very lucky, contact tracing and rigorously enforced quarantine and social distancing (close schools, stop events involving crowds, etc.) might just buy us time until a vaccine is available.