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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Dentists Whitening Large Tooth
Ikon Ikon Images
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
Dental Floss
Photo Researchers, Inc.
Hand Washing
Photo Researchers, Inc.
Hand Washing #4
Photo Researchers, Inc.
Woman With Soap, 1930s #1
H. Armstrong Roberts/ClassicStock
Mother Helping Son Brush Teeth
Ikon Ikon Images
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
Hand Washing #5
Photo Researchers, Inc.
Hand Washing #7
Photo Researchers, Inc.
Hand Washing #8
Photo Researchers, Inc.
Hand Washing #13
Photo Researchers, Inc.
Hand Washing #14
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 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
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