- Diphtheria Facts
 - Infections: Diphtheria
- From KidsHealth.org. Signs and symptoms, facts, prevention, and advice for parents.
- MedlinePlus: Diphtheria
- Resources on the disease include symptoms, tests, treatment, causes, and prevention.
- Bacterial and Mycotic Diseases: Diphtheria
- Technical information and articles from the CDC.
- Diphtheria (Corynebacterium diphtheriae)
- From the University of Wisconsin Department of Bacteriology. Examines and illustrates the pathogenicity and toxigenicity of the bacterial infection.
- MDTravel Health: Diphtheria
- Offers recommendations for physicians and travellers.
- drkoop.com: Diphtheria
- Advice and facts on causes, risks, symptoms, prevention, and treatment.
- Dr. Spock: Diphtheria
- Information on the disease and its vaccine.
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