Some veterinarians began collecting evidence indicating that the duration of immunity of particular vaccines may be longer than previously thought. (pawprintsthemagazine.com)
The body uses vitamin C for growth and repair, and it serves a considerable antioxidant purpose in the body to boost immunity from disease. (herbazest.com)
Because of the reduced level of immunity in older dogs treatment should also be given them on occasion. (pitbullregistry.com)