Las Vegas hospital blazes own path with malaria drug to treat COVID-19 University Medical Center recently began prescribing hydroxychloroquine to high-risk emergency room patients who test positive for COVID-19 but do not require immediate hospitalization. By Mary Hynes / Las Vegas Review-Journal  Emergency medicine physician Dr. Thomas Zyniewicz talks to a reporter at University Medical Center in Las Vegas Thursday, April 9, 2020. Zyniewicz said UMC is prescribing hydroxychloroquine for COVID-19 patients. (K.M. Cannon/Las Vegas Review-Journal) @KMCannonPhoto University Medical Center on Tuesday began prescribing hydroxychloroquine to high-risk emergency room patients who test positive for COVID-19 but do not require...