Infectious medical waste is medical waste which is capable of producing an infectious disease. Medical waste shall be considered capable of producing an infectious disease if it has been, or is likely to have been, contaminated by an organism likely to be pathogenic to healthy humans, if such organism is not routinely and freely available in the community, and such organism has a significant probability of being present in sufficient quantities and with sufficient virulence to transmit disease.

Cultures and stock of microorganisms and biologicals:
Blood and Blood Products:
Pathological Wastes:
Sharps:
Animal Carcasses, Body Parts, Bedding and Related Wastes:
Isolation Wastes:
Class 4 Viral Agents: Any residue or contaminated soil, water, or other debris resulting from the cleanup of a spill of any infectious medical waste; and Waste contaminated by or mixed with infectious medical waste.

Section 8 of the Infectious Medical Waste Rule, 64CSR56, addresses storage of medical wastes. In summary it states that wastes: shall not be stored onsite for more than thirty (30) days, shall be stored at or near the point of pickup or treatment in a manner that maintains the integrity of the containers (prevents leakage, provides protection from water, rain, and wind). The storage area shall be: constructed of easily cleanable, impermeable, durable materials, the floor shall not be carpeted or have open seams, and floor drains must discharge to a sanitary sewer disposal system. Storage areas must be kept clean and in good repair, have access control to prohibit unauthorized entry, and be posted with the international biohazard symbol.