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Influenza Encyclopedia

ï~~ 1a * CALIFORNIA STATE BOARD OF HEALTH MONTHLY BULLETIN al I i r r, Ft>. s ng school ordinarily ust expect se diseases iare many Nasles I I Floating laboratory used in the delta region of the Sacramento and San Joaquin rivers, where specimens from thousands of Oriental laborers are examined for hookworm and other parasitic diseases. This is but part of the equipment used by the California State Board of Health in safeguarding tae health of California against Oriental diseases. jT INCREASING PREVALENCE OF SMALLPOX A HOUSE-BOAT LABORATORY 9 APRIL, 1919

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