So when can we switch to a 30 - year booster schedule? (sciencedaily.com)
After the initial shot, annual boosters are supposed to be given, although for some vaccines, a three - year booster interval is recommended. (petsmagazine.com.sg)
Some strains of distemper vaccine provide nearly lifelong immunity after the initial series and one - year booster while other strains provide a shorter duration of immunity. (vetinfo.com)