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2. Swamp near Natal, Brazil where Anopheles gambiae mosquitoes were first found in the Western Hemisphere
3. Fred L. Soper at an old fort in Bahia, Brazil
4. Yellow fever headquarters at Cuiaba, Mato Grosso, Brazil
5. Nurses' House and Central Office of the Yellow Fever Service, Rio de Janeiro
6. The Central Office of the Yellow Fever Service, Rio de Janeiro
7. View of Rio de Janeiro from Wilbur A. Sawyer's room at the Gloria Hotel
8. Fred L. Soper and Amaral Machado in the doorway of the Health Department building, Bahia, Brazil
9. Yellow Fever Laboratory, Bahia, Brazil
10. Workers in the Yellow Fever Laboratory at Bahia, Brazil
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