Dr. Bruce Davidson, a pulmonary physician, oversaw Philadelphia’s tuberculosis control program during an outbreak of drug-resistant TB in the 1990s. One time-tested infection-control approach that Philadelphia and other cities used was installing ultraviolet lamps near the ceilings in TB clinics and other high-risk settings.

Dr. Bruce Davidson, a pulmonary physician, oversaw Philadelphia’s tuberculosis control program during an outbreak of drug-resistant TB in the 1990s. One time-tested infection-control approach that Philadelphia and other cities used was installing ultraviolet lamps near the ceilings in TB clinics and other high-risk settings.