Meningococcal disease, 1965.
D006801:Humans; D008589:Meningococcal Infections / Q000453:epidemiology* / Q000628:therapy*; D008887:Military Medicine; D010400:Penicillin G / Q000627:therapeutic use*; D010403:Penicillin Resistance; D013449:Sulfonamides / Q000627:therapeutic use; D014481:United States
D013449:Sulfonamides; D010400:Penicillin G