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Wastewater samples in a lab at the University of Missouri’s Christopher S. Bond Life Sciences Center in Columbia, Mo., May 6, 2021. Researcher…

Marc Johnson, a virologist at the University of Missouri, examines leftover ribonucleic acid (RNA) from samples of wastewater collected by the…

Lewis Chastain, an undergraduate student, works with wastewater samples in a lab at the University of Missouri’s Christopher S. Bond Life Scie…

Marc Johnson, a virologist at the University of Missouri who spotted traces in wastewater samples of the more contagious variant of the corona…

Wastewater samples are unloaded at the University of Missouri’s Christopher S. Bond Life Sciences Center in Columbia, Mo., May 6. Researchers …

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Dr. I. Hope Alexander, Pittsburgh health director, congratulates Dr. Jonas E. Salk, with briefcase, after Dr. Salk arrived at the airport in P…