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Pay attention to hygiene, take precautions against disease

Pay attention to hygiene, take precautions against disease (1983, April)

Prevent viral hepatitis

Prevent viral hepatitis (1983, December)

Pay attention to hygiene, love cleanliness / Hard work and plain living, diligent and thrifty

Pay attention to hygiene, love cleanliness / Hard work and plain living, diligent and thrifty (1996, October)

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