It is a series of two injections given 2-3 weeks apart, one in each breast, followed by a yearly booster. The cost varies from vet to vet and from area to area. Before getting them I looked into the risks and, so far, only minor side effects like skin discoloration or thickening at the injection site have been reported. My birds did fine. Polyoma, Psittacine Beak and Feather Disease, Proventricular Dilatation Disease, and Pacheco's Disease are all serious viral diseases that can be found in birds.
Polyoma now has a vaccine.
Do not use without written permission. Trademark Information 85382 Sessions for 2001.