Which of the following is a major concern when dealing with bodily fluids in first aid?

When working with bodily fluids in first aid, a primary concern is the transmission of diseases. Bodily fluids, such as blood, saliva, and other secretions, can carry pathogens like viruses and bacteria that are capable of causing infections. Understanding the risk of cross-contamination is crucial for both the safety of the first aider and the individual receiving care. Effective precautions must be taken, such as using personal protective equipment (PPE) like gloves and masks, to minimize exposure and potential spread of infectious diseases, including HIV, hepatitis B, and influenza, among others.

While the comfort of the victim, the temperature of the fluids, and the duration of treatment may also be aspects to consider in the first aid process, they do not carry the same level of urgency or risk regarding health and safety as the risk of disease transmission. Therefore, prioritizing the prevention of disease spread is essential in any first aid situation where bodily fluids are involved.