On the negative phase of postvaccination immunity to typhoid with reference to the results of epidemiological studies.
D004196:Disease Outbreaks; D004812:Epidemiologic Methods; D006801:Humans; D007109:Immunity; D007117:Immunization, Secondary; D014435:Typhoid Fever / Q000276:immunology*; D014436:Typhoid-Paratyphoid Vaccines / Q000627:therapeutic use*; D014611:Vaccination
D014436:Typhoid-Paratyphoid Vaccines