Your puppy is not protected from this deadly virus until he/she has had all 3 sets of puppy vaccines & a minimum of 2 wks after last vaccine is given. Even after all 3 are done your puppy can still contract Parvo, however symptoms may be less severe if vaccinated. It is much safer to wait until your puppy has had time for its immune system to strengthen which is around 6 months old or so before taking your puppy in areas where Parvo is most found such as public parks, pet stores, rest stops, and doggy parks or on the ground out in front of vet offices.
Parvo is a Highly contagious virus that is almost always fatal and it attacks the intestines of the puppy . It can live for up to 6 years in areas where Parvo has been. It is a very hardy virus that is hard to kill and lives in dirt and grass.