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Start Over Subjects Smallpox Vaccine -- therapeutic use ✖Remove constraint Subjects: Smallpox Vaccine -- therapeutic use Subjects Health Education ✖Remove constraint Subjects: Health Education Subjects China ✖Remove constraint Subjects: China Languages Chinese ✖Remove constraint Languages: Chinese Genre Posters ✖Remove constraint Genre: Posters Publication Year 1956 ✖Remove constraint Publication Year: 1956

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