Study reveals contributing factor to inconsistent results in clinical trials for COVID-19 drugs Jul 8 2021 A new study suggests that significant variation in the amount of virus from person to person may be a contributing factor to inconsistent findings reported in clinical trials for antiviral COVID-19 drugs. The study is led by Keisuke Ejima, an assistant research scientist at the Indiana University School of Public Health-Bloomington. A new study suggests that significant variation in the amount of virus from person to person may be a contributing factor to inconsistent findings reported in clinical trials for antiviral COVID-19 drugs. Photo courtesy of Getty Images