attenuated vaccine
“live” virus
MMR
inactivated
“dead” virus
Salk polio
subunit
have antigenic fragments of a microorganism
includes toxoids and recombinant vaccines
acellular pertussis
toxoid
tetanus
conjugated vaccines
combine desired antigen w a protein that boosts immune response
west nile for horses
why does vaccination work?
herd immunity results when most of a population is immune to a disease