Mother Reciting This Little Piggy
H. Armstrong Roberts/ClassicStock
Soapy Girl In Sink, C.1940s
H Armstrong Roberts ClassicStock
Bacteria Growing On Dollar Bill #3
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Hygiene and Cleanliness FAP Poster 1939
Science Source
Hygeia, Greek Goddess Of Health
Science Source
Aesculapius And Hygeia
Science Source
Boy Washing Face, C.1930s
H. Armstrong Roberts/ClassicStock
Bacteria Growing On Dollar Bill #1
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Bacteria Growing On Dollar Bill #5
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Traditional Village Life On River
Ikon Ikon Images
Hand Washing #4
Photo Researchers, Inc.
Woman With Soap, 1930s #1
H. Armstrong Roberts/ClassicStock
Hospital Sink
Photo Researchers
Hand Washing #6
Photo Researchers, Inc.
Hand Washing #9
Photo Researchers, Inc.
Hand Washing
Photo Researchers
Hand Washing #11
Photo Researchers, Inc.
Hand Washing #12
Photo Researchers, Inc.
Hospital Treatment Area
Jim Ziv / Dorling Kindersley
Bacteria Transferred From Banknote #1
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Bacteria Transferred From Hand #4
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Bacteria Transferred From Banknote #3
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Bacteria Transferred From Banknote #4
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Edmund Alexander Parkes, Hygienist
Wellcome Images
Hygeia, Greek Goddess Of Health #1
Wellcome Images
Dental Floss
Photo Researchers, Inc.
Hand Washing
Photo Researchers, Inc.
Hand Washing #5
Photo Researchers, Inc.
Hand Washing #7
Photo Researchers, Inc.
Hand Washing #8
Photo Researchers, Inc.
Mother Washing Baby In Bath Tub, C.1960s
H. Armstrong Roberts/ClassicStock
Sem Of Bacteria From Dollar Bill
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Bacteria Transferred From Banknote
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Bacteria Growing On Dollar Bill
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Bacteria Transferred From Hand
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Bacteria Transferred From Banknote #2
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Sem Of Bacteria From Dollar Bill #2
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Clean Leaf Of Iceberg Lettuce
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Bacteria Growing On Dollar Bill #2
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Bacteria Transferred From Hand #3
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Anaglyph Of Human Feces #1
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Bacteria Transferred From Hand #5
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Hygeia, Greek Goddess Of Health
Wellcome Images
Mother Helping Son Brush Teeth
Ikon Ikon Images
Mother Bathing Son In Baby Bathtub
Ikon Ikon Images
Dental Tollietres
Photo Researchers, Inc.
Hand Washing #3
Photo Researchers, Inc.
Hospital Sink
Photo Researchers, Inc.
Hospital Sink #2
Photo Researchers
Kilauea Volcano, Hawaii #1
Stephen & Donna O'Meara
Bacteria Transferred From Hand #1
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Bacteria Transferred From Hand #2
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Bacteria Growing On Dollar Bill #4
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Mother Helping Baby Brush Teeth
Ikon Ikon Images
Dental Tollietres #1
Photo Researchers, Inc.
Dental Toiletries
Photo Researchers, Inc.
Hand Washing #1
Photo Researchers, Inc.
Hand Washing #2
Photo Researchers, Inc.
Synthetic Exam Gloves
Photo Researchers, Inc.
Hospital Sink #1
Photo Researchers
Hand Washing #10
Photo Researchers, Inc.
Boy Combing Hair, C.1950s
E. Hibbs/ClassicStock
Sem Of Bacteria From Dollar Bill #1
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Bacteria In Human Feces
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Anaglyph Of Human Feces
Scimat
Bacteria Growing On Dollar Bill #6
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Man And Woman Getting Ready In Morning
Ikon Ikon Images
Happy Woman Doing Housework Holding
Ikon Ikon Images
Woman Pampering Herself Pedicure
Ikon Ikon Images