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The great Jonas Salk developed the first polio vaccine in the 1950s
ACTUAL SIZE Adult females are only about 0
3 million years ago when the human ancestor
fungi and protists – have cells with mitochondria as well as nuclei with DNA
Common Cold key chain (Rhinovirus) Pests The great Jonas Salk developedBillions of people a year catch the cold. Now you can get one too! Learn all about the Common Cold with this cuddly companion. Unique way to say Get Well Soon! Great educational tool for teachers, parents, and health professionals Terrific reminder to wash your hands frequently
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