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Briggs Carhart, a master’s degree student in public health, helps the Arizona Poison and Drug Information Center field the hundreds of daily calls they receive from people worried about the COVID-19 pandemic.  (Photo: University of Arizona Health Sciences) Briggs Carhart, a master’s degree student in public health, helps the Arizona Poison and Drug Information Center field the hundreds of daily calls they receive from people worried about the COVID-19 pandemic.