Vaccinations Flashcards
what is vaccination?
the deliberate administration of antigenic material to produce immunity to a disease
when are memory T and B cells generated?
during the primary adaptive immune response
what causes rapid re-activation of memory lymphocytes?
a second encounter with their specific antigen
what happens when memory cells have been activated?
they undergo clonal proliferation, expansion and differentiation into effector cells
what does preformed IgG cause?
ability to clear infections during incubation periods
what does preformed IgA block?
bacterial attachment to mucous membranes
what is immunisation?
the process through which an individual develops immunity to a disease
what two ways can a person become immunised?
either naturally or deliberately
what is active immunity?
protection produced by a persons own immune system
what is passive immunity?
protection passed on from another person
which is permanent, active immunity or passive immunity?
active
state an example of passive immunity?
placental transfer of antibodies
what are the two major types of vaccines?
inactivated
live attenuated
what do inactivated vaccines contain?
inactivated or dead pathogens
which type of vaccine often requires booster vaccines?
inactivated
