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Typhus Vaccine: Recommendation on Immunization Practices

Ann Intern Med. 1968;69(4):785-786. doi:10.7326/0003-4819-69-4-785
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Issued by the Advisory Committee on Immunization Practices, U. S. Public Health Service, meeting on February 15, 1968: The United States has not experienced an outbreak of louse-borne (epidemic) typhus since 1922. The last reported case, 1950, did not result from an indigenous source of infection.Louse-borne typhus was widespread in many countries affected by World War II. Since 1945 reported cases have declined steadily. Effective insecticides and generally improved standards of living have permitted many populations to free themselves of louse infestation. A human reservoir of latent infections persists in many parts of the world, and resurgence of the


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