From whom do children catch pertussis?
D000293:Adolescent; D000328:Adult; D001886:Bordetella pertussis / Q000302:isolation & purification; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D014917:Whooping Cough / Q000235:genetics* / Q000382:microbiology / Q000635:transmission