The episode's title refers to the hospital's commissary clerk who dies and is memorialized by the staff. This character is seen alive and well, selling Juicy Fruit and Sugar-Free Gummy Bears in the following episode.
Jackie already knew patient had head lice. Dr Roman would have been warned ahead of time and had a hair net on. All staff assisting the patient would also be wearing one. Dr cooper would have worn one while examining Dr Roman.