Why 3 shots of cervarix for hpv? will this last forever and i don't need to get the shots again? and is there a vaccine for herpes?? i have hpv 16

Immune stimulation: Research has shown dependable long term immunity with the three dose series while one or two would not consistently provide that benefit. Such is true with some vaccines, which push your immune system to work, but do not have the same stimulant effect as the actual disease.The infection would be a continuous trigger. No herpes vaccine is currently available.