By Donald G. McNeil Jr.
April 15, 2019
BUSHORO, Uganda — Lying on a church pew with his arm over his head, 6-year-old Gordon Andindagaye whimpered a bit — in fear, not pain — as Dr. William A. Cherniak slowly swept a small ultrasound scanner up and down his chest. Dr. Cherniak and Rodgers Ssekawoko Muhumuza, the Ugandan clinical officer he was training, stared at the iPhone into which the scanner was plugged, watching Gordon’s lung expand and contract.