<prompt> Live vaccine is ?Salk polioKFDSabin polioMeningococci  <response>: There are 4 main types of vaccines: Live-attenuated vaccines Inactivated vaccines Subunit, recombinant, polysaccharide, and conjugate vaccines Toxoid vaccines Live-attenuated vaccines Live vaccines use a weakened or attenuated form of the germ that causes a disease. 