According to About.com, a DA2PPV vaccine is a canine vaccination for distemper, hepatitis, parvovirus and the parainfluenza viruses. The DA2PPV vaccine, sometimes also known as the DA2PP or DA2PPC vaccine, is a combination vaccine that protects against many dangerous canine diseases.
About.com states that the letters in the DA2PPV vaccine stand for abbreviations used in vaccines which are as follows: D for distemper, H or A2 for adenovirus type 2 and Hepatitis, P for parainfluenza, PV for parvovirus, L for leptospirosis and C for coronavirus.
According to Wikipedia, the DA2PP is often given to puppies at the eight-, 12- and 16-week age mark, then again when the dog turns one year of age. Afterwards, the DA2PP vaccination is administered annually or every three years to protect dogs from canine distemper.