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Karl M. Johnson
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Epidemiology of Machupo Virus Infection

III. Significance of Virological Observations in Man and Animals

Karl M. Johnson
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Miguel Kourany and Karl M. Johnson
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Hong Kong Influenza in the Panamá Canal Zone

First Epidemic by a New Variant in the Western Hemisphere

Ihor G. Zachary and Karl M. Johnson
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Arnold S. Monto and Karl M. Johnson
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Peter T. Franck and Karl M. Johnson
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Marius G. Peacock, Richard A. Ormsbee, and Karl M. Johnson
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