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Free Picture: Neutralizing Antibody Test
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Description Peggy Greb photograph of in an ongoing study, physiologist Charles Stephensen using a neutralizing antibody test to measure immune response in individuals receiving vitamin A supplements.
Keywords agriculture, ars, charles stephensen, department of agriculture, dept of agriculture, immune response, lab, laboratory, male, man, men, microscope, microscopes, neutralizing antibody test, one man, one person, people, person, physiologist, physiologists, research, us department of agriculture, agricultural research, free photography, free photo, free photos, free picture, free pictures, free image, free images
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