Puppies and kittens require a series of vaccinations to protect them against various diseases. The specific vaccines and timing may vary depending on factors such as your pet's age, breed, and lifestyle. Typically, puppies and kittens receive their initial vaccines between 6 and 8 weeks of age, with boosters given every 3-4 weeks until they are about 16 weeks old. Common vaccines for puppies include distemper, parvovirus, adenovirus, leptospirosis, Bordetella, and rabies. Common vaccines for kittens include rabies, leukemia, feline herpesvirus, feline calicivirus, and feline panleukopenia. Your veterinarian can provide more information about which vaccines your pet needs and when they are due.