Switzerland, 1944 (b/w photo)

A technical device for recording the flight altitude and climatic flight conditions is attached to the flight wing. Pertussis cough flights for sick children by the Swiss airline Alpar in Bern-Belp, recorded in August 1944. Whole groups of children were transported in planes and flown to an altitude of more than 3000 meters in open cabin doors, where they circled for one hour. The parents paid between 40 and 50 francs for it. In the vast majority of patients there was a considerable improvement within the first 5 days after the flight until the infectious disease was completely subsided.