Which item is prohibited from the room of a hematopoietic stem cell transplant patient in a Protective Environment?

1. Dried flowers, fresh flowers and potted plants are prohibited in the rooms of these transplant patients. 2. Molecular typing found indistinguishable strains of Aspergillus terreus in patients with haematologic malignancies and in potted plants near them. 3. Scrubbable surfaces are chosen on purpose over upholstery and carpet, because they hold less dust. 4. HEPA filtered incoming air and well-sealed rooms are two of the controls that build the environment rather than things banned from it. _Source: CDC Guideline for Isolation Precautions: Preventing Transmission of Infectious Agents in Healthcare Settings (2007), Part III, section III.F. Protective Environment_