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Start Over Formats Still image ✖Remove constraint Formats: Still image Subjects Nigeria ✖Remove constraint Subjects: Nigeria Subjects Yellow Fever ✖Remove constraint Subjects: Yellow Fever Titles Wilbur A. Sawyer at the village office of the Yellow Fever Laboratory in Yaba, Nigeria ✖Remove constraint Titles: Wilbur A. Sawyer at the village office of the Yellow Fever Laboratory in Yaba, Nigeria

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