Which of the following is a method to prevent communicable diseases?

Immunization is a critical method for preventing the spread of communicable diseases by providing individuals with immunity against specific pathogens, thereby reducing the incidence of those diseases within the community. It protects not only the vaccinated individual but also contributes to herd immunity, which helps to protect those who are unable to be vaccinated due to medical reasons.

Isolation is another important method, particularly for individuals who are already infected with a communicable disease. By separating infected individuals from healthy ones, it limits the potential for disease transmission, thereby controlling outbreaks and protecting public health.

Universal precautions refer to a set of practices designed to prevent the transmission of communicable diseases, particularly in healthcare settings. This approach promotes the assumption that all blood and bodily fluids are potentially infectious, guiding practitioners to use protective barriers such as gloves and masks to minimize risk.

Given that immunization, isolation, and universal precautions each play a significant role in preventing communicable diseases, the chosen answer, which encompasses all these methods, is indeed correct. By employing a comprehensive strategy that includes all these approaches, public health efforts can effectively reduce the spread and impact of communicable diseases in the population.