A crowd brandishing banners and toothbrushes stand upon a personified smiling world: promoting dental hygiene to mark World Health Day in Tanzania. Colour lithograph by Unicef, 1994.

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Credit

A crowd brandishing banners and toothbrushes stand upon a personified smiling world: promoting dental hygiene to mark World Health Day in Tanzania. Colour lithograph by Unicef, 1994. In copyright. Source: Wellcome Collection.