In the context of combat sports, "blood" is a concern due to the risk of transmitting bloodborne pathogens, injury management, and the ethical implications of violent encounters. For example, in sports like boxing or mixed martial arts (MMA), the presence of blood can signal significant injury or health risks, thus prompting medical assessments. Organizations enforce strict health protocols to ensure athlete safety, including immediate medical intervention and examining bleeding rules to maintain the sport's integrity while protecting competitors.