Which of the following is considered a biohazard?

Blood and other potentially infectious materials are considered biohazards because they pose a significant risk to human health and safety. These materials can harbor pathogens such as viruses and bacteria that can lead to serious illnesses and transmission of diseases, particularly in occupational settings where exposure may occur, such as healthcare facilities or laboratories. The presence of these substances necessitates specific handling, storage, and disposal procedures to minimize the risk of infection or disease spread.

In contrast, cotton swabs, paper towels, and plastic containers do not inherently carry the same level of risk unless they are contaminated with biohazardous materials. While they can be associated with hazardous waste if they become contaminated, they are not classified as biohazards on their own. This distinction emphasizes the importance of identifying and managing only those items that pose a direct threat to health when implementing a bloodborne pathogens program.