USP <797> reports standards and policies for all physical environments in which compounded sterile preparations (CSPs) are prepared, packaged, and stored. The standards apply specifically to people who prepare CSPs and must take care to reduce the risk of contamination from their behaviors, hygiene, and clothing (i.e., garb). Clinical workers whose work lies within this realm must be individually trained and evaluated to maintain the standards and reduce microbial contamination that results from contact.