The parvo vaccine for dogs is typically part of a combination injection called DA2PP or DHPP. DHPP stands for Distemper, Hepatitis, Parainfluenza, and Parvo. It is a core vaccine that is needed by all dogs, and it protects against canine distemper, parvovirus, parainfluenza, and two types of adenovirus (hepatitis). The DHPP vaccine is usually given to puppies starting at 6 weeks of age, and they should receive a high titer low passage booster every 3-4 weeks until they are approximately 16 weeks old. After the first year, the distemper/parvo combination vaccine can be given every three years.