Must meet cleanroom gowning requirements, including wearing full gowning (face coverings, gloves, hoods, goggles) for up to 3 consecutive hours at a time, minimal movement in the cleanroom, and working with or around human blood, blood-derived materials, cells, other biological materials, and alcohol-based sprays. Use of cosmetics (makeup, painted nails), jewelry, or facial piercings is not permitted in the cleanroom, and any skin conditions that cause shedding must be disclosed.