" announced the travel restrictions to and from China, effective Feb. 2"   https://www.factcheck.org/2020/03/the-facts-on-trumps-travel-restrictions/

 (signed 31st jan  https://www.latimes.com/politics/story/2020-03-26/trump-coronavirus-china-claims  )

And it's not negligence not to even sample test the crew that went ashore?

Some said the COVID passed from bats to humans; I haven't heard of chinese eating bat b4 that but its well know the viets(&indonesians)are the bat gourmets in SE asia