Study in the Epidemiology of Diphtheria in Relation to the Active Immunization of Certain Age Groups
- PMID: 18013460
- PMCID: PMC1556855
- DOI: 10.2105/ajph.22.3.237-b
Study in the Epidemiology of Diphtheria in Relation to the Active Immunization of Certain Age Groups
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