Maybe not. You want a society to develop herd immunity for a flu-like disease during warmer weather months. Since they failed to contain it, the disease is just

Maybe not. You want a society to develop herd immunity for a flu-like disease during warmer weather months. Since they failed to contain it, the disease is just going to show up in China again but this time from sick people traveling to China. The worst case scenario is lockdown during warmer months and then having it flare up again in winter months. That said, we could just apply medical quarantine procedures used for animals to humans. Get a lab test 48 hours prior to international travel and have an additional test performed upon landing at the destination. The first test minimizes the likelihood of someone with viral shedding traveling and the lab test upon landing let’s you get the person and isolate them immediately before they’ve shed virally.