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Start Over Subjects Mass Screening ✖Remove constraint Subjects: Mass Screening Titles [Men being tested for spotted fever by scientists from the Rocky Mountain Laboratory in Hamilton, Montana] ✖Remove constraint Titles: [Men being tested for spotted fever by scientists from the Rocky Mountain Laboratory in Hamilton, Montana] Dates by Range 1900-1949 ✖Remove constraint Dates by Range: 1900-1949

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  • [Men being tested for spotted fever by scientists from the Rocky Mountain Laboratory in Hamilton, Montana]1