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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
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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
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Karl M. Johnson
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Peter T. Franck
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Karl M. Johnson
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Arnold S. Monto
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Karl M. Johnson
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C. Brian Robbins
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John W. Krebs Jr.
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Karl M. Johnson
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William H. Dietz Jr.
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Pauline H. Peralta
, and
Karl M. Johnson
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