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
Air transportation unquestionably spreads disease. Should airlines be more proactive by requiring proof of vaccination? Two experts reflect on the current and former crises.
A new reactor may soon be able to safely disinfect the air in crowded spaces.
A sign at a clinic in Vancouver, Washington on Jan. 25, 2019 asks unvaccinated children 12 and younger to leave the facility.
Gillian Flaccus/AP Photos
A measles outbreak is causing major concern in a Washington county where only 22 percent of children are vaccinated against the disease. A vaccine expert explains the risks.
Mourners wait to attend the funeral of Heather Heyer in Charlottesville, Virginia, Aug. 16, 2017 after Heyer was killed attending a rally to protest white nationalism.
Julia Rendleman/AP Photo
As death tolls rise from hate crimes, a psychiatrist wonders: Is it time to treat bigotry like a disease?