The first antileprosy drug, introduced in the 1950 ’ s, acted slowly and became increasingly ineffective because the leprosy bacillus developed resistance to it.
Pirmo pretlepras preparātu ieviesa mūsu gadsimta 50. gados, taču tas iedarbojās lēni un drīz vairs nebija efektīvs, jo lepras baciļiem pret to attīstījās rezistence.