Explain the underlying principles and immunological mechanisms of using vaccines to prevent disease outbreaks.
Describe how vaccination introduces small quantities of dead or inactive pathogens to safely stimulate white blood cells into producing specific antibodies.
Understand that subsequent exposure to the active pathogen results in a rapid secondary immune response, preventing the infection from taking hold.
Explain the concept of herd immunity, where vaccinating a large proportion of a population drastically reduces the overall spread of a pathogen.
