They are temp checked before they get into the foreign airport, they are temp checked at the gate and FAA regs require gate agents and stews to report any passenger they think is sick. I put up three or four videos of travelers who were shocked there weren’t things like temp checks to go along with Customs questioning when they arrived. They wanted a handout or as one put it, a ‘booklet’ to read. Those that had lived in China for years weren’t used to nontotalitarian control. I don’t know if BP&C has gotten stricter since they limited the flights to 7 ports of entry, I’m hoping they have. Other than the first two days after the Feb 2 restriction, I haven’t seen any other disappointed traveler videos. So I guess they worked the new policy in 24 hours bugs out?
As it stands right now today, no foreign nationals from anywhere in China are allowed to board at the foreign airport and any other foreign nationals that have traveled through China are in a 14-day mandatory quarantine - why Calif has 8600 of them. We do have a large population of Iranians on Calif however, especially in LAX area.