Associate Professor Guy German, left, and Distinguished Professor Kaiming Ye, chair of the Department of Biomedical Engineering, have new research that offers provable standards for ultraviolet disinfection. Image Credit: Jonathan Cohen.   When the COVID-19 pandemic emerged in early 2020, ultraviolet radiation became one of the go-to methods for preventing the spread of the SARS-CoV-2 virus, along with facemasks, hand sanitizer and social distancing.   The problem: There was little research showing what UV dosage kills the virus. What wavel...