If the mother is fully vaccinated against Parvo, the puppies will inherit antibodies from the mother which will protect them against the virus during the first 6 weeks of their lives. However, as the puppies start weaning at about 6 weeks of age, their immune systems weaken and the young pups become susceptible to the disease. Vets strongly encourage pet owners to begin vaccinating their puppy against Parvo when they are 6 weeks old when the puppy starts to wean and the antibodies from the mother are no longer there to protect them. It's also important to note that puppies aren't protected against the disease until they have received all 3 Parvo vaccinations. Your puppy should receive their Parvovirus shot at 6, 8, and 12 weeks of age. If your four-legged friend is being treated by a veterinarian and survives the first four days after symptoms appear, there is a good chance that your puppy will recover from the disease. It typically takes about a week for dogs to recover from Parvo. Never let your puppy spend time around dogs that aren't fully vaccinated against Parvovirus.