Lymph is a fluid that circulates throughout the body in the lymphatic system. It forms when tissue fluids/blood plasma (mostly water, with proteins and other dissolved substances) drain into the lymphatic system. It contains a high number of lymphocytes (white cells that fight infection).
Puppies normally get their first shots around 8 weeks old, but they can be given earlier if needed (ie with stray, abandoned pups or those who were formula fed). Three sets of combination vaccinations (a shot that protects against more than one disease) given at 3 week intervals. 8 weeks - first round.
Most veterinarians recommend that a puppy receive his first parvovirus vaccination when he is 8 weeks old. The second vaccination is given in three to four weeks, about age 11 to 12 weeks. A third vaccination is given in three to four more weeks, about age 14 to 15 weeks. A vaccination is sometimes given three to four weeks later, about age 17 to 18 weeks. Most all veterinarians agree the final vaccination in the series should be given after the puppy is 4 months old. Once the puppy series is complete, your dog should received a booster vaccination each year.