[STUDY ON ENDEMO-EPIDEMIC RATE OF PERTUSSIS].
D002648:Child; D058872:Epidemics; D004813:Epidemiology; D006801:Humans; D007223:Infant; D014917:Whooping Cough
CHILD; EPIDEMIOLOGY; INFANT; WHOOPING COUGH
STUDIO SULL'ANDAMENTO ENDEMO-EPIDEMICO DELLA PERTOSSE.