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Public health – Analysis and Comment

Bill Chen at San Francisco International Airport after arriving on a flight from Shanghai. Chen said his temperature was screened at the Shanghai airport before he departed. AP Photo/Terry Chea

Airplanes spread diseases quickly – so maybe unvaccinated people shouldn’t be allowed to fly

Air transportation unquestionably spreads disease. Should airlines be more proactive by requiring proof of vaccination? Two experts reflect on the current and former crises.