EDIT 4/28/2021: As of April 27, 2021, the Tiering system referenced in this post has been discontinued. Investigators are no longer required to make a Tiering determination for their studies. In order to mitigate the risks of COVID-19 in human research, VCU OVPRI has implemented a Tiering system to stratify research projects based on the … Continue reading ACTION REQUIRED: Human Research Tiering Documentation