are we fighting about terms now?

vaccine is something what provides you so called "adaptive immunity" towards something. depending on how good is the vaccine, it may reduce, treat or cure. there are no reasons for denying vaccines just by saying that «they are actually not 100% good but only 80% good». 

also, the word vaccine comes from Latin vaccīnus (“of or derived from a cow”), so a "vaccine" can be whatever reduce/cure/treatment/lilhelp shit it is. it's not a «panacea» (from Ancient Greek "all-healing")