Occurrence of Diphtheria in Recent Years, With a Special View to the Influence of the Antidiphtheric Yaccination

Factor From the Respiratory Tract of Man Bacterium Diphtheriae Capable of Inhibiting the Growth of Coryne‐

“…observations ( l l ) , are most likely to develop the disease. However, during recent years experience has shown that, e. g., in Denmark (12, 13,14) and Norway (15), as well as in Sweden ( l o ) , extensive inoculations among children often lead to a relative increase in the morbidity of diphtheria in adults.…”