What two virus types must be assumed in cleanup sites that contain human blood?

The correct response is grounded in the understanding of bloodborne pathogens. Hepatitis B virus (HBV) and Human Immunodeficiency Virus (HIV) are significant concerns in any cleanup scenario involving human blood.

Hepatitis B is known for its high transmissibility and the potential to cause severe liver disease. It can survive outside the body for up to a week, making it essential to consider during cleanup. The risk of transmission through contact with contaminated blood necessitates strict adherence to safety protocols.

Similarly, HIV, the virus responsible for AIDS, can also be transmitted through blood, though its survivability outside the host is less than that of HBV. Despite the lower risk in environmental contexts, precautions must be taken to mitigate any chance of exposure during cleanup.

Other options include different virus combinations, but they do not reflect the same level of concern associated with bloodborne pathogens as Hepatitis B and HIV. A thorough understanding of these viruses enhances safety in situations involving potential exposure to human blood.