Keep your dog healthy and happy with Canine Spectra 9. It's an economical annual booster offering 9-way protection against Canine Distemper, Adenovirus Type 2, Hepatitis, Parainfluenza, Parvovirus, Leptospira Canicola, Leptospira Grippotyphosa, Leptospira Icterohaemorrhagiae and Leptospira Pomona. Canine spectra 9 is an economical annual booster offering 9-way protection against Canine Distemper, Adenovirus Type 2, Hepatitis, Parainfluenza, Parvovirus, Leptospira Canicola, Leptospira Grippotyphosa, Leptospira Icterohaemorrhagiae and Leptospira Pomona If a puppy: Administer booster shots every three weeks until 18 weeks of age. If dog is older than 18 weeks: If the dog previously received a vaccination containing Lepto or Corona from a Vet, then the dog receives an annual shot. If the dog HAS NOT previously received a vaccination containing Lepto or Corona, then the dog receives a booster vaccination 3 weeks after the first Lepto/Corona vaccination.