What is defined as protection against disease?

Immunity is defined as the body's ability to resist or defend against pathogens, such as bacteria and viruses, which can cause diseases. It involves a complex network of cells and proteins that work together to recognize and neutralize harmful invaders. Natural immunity can develop through exposure to pathogens, while acquired immunity can be stimulated through vaccinations. This makes immunity a critical aspect of health, as it not only protects individuals from infections but also helps prevent the spread of diseases within populations.

Resistance, although it may appear similar, typically refers to the ability of an organism to withstand the effects of pathogens or toxins, but it is not strictly limited to the context of disease protection. Vaccination is a method used to stimulate immune response and create immunity, but it is not the definition of protection itself. Health encompasses a broader concept that includes overall physical, mental, and social well-being, rather than focusing solely on the protection against diseases. Therefore, immunity is the most precise term that directly defines the protection against disease.