1 Feline stomatitis is a severe, painful inflammation of a catâs mouth and gums. 2  Dental disease, certain viruses, and some other inflammatory conditions can cause feline stomatitis.  The long-term outcome can vary. Many cats require long-term treatment to control the condition.
Vaccine Adverse Event Reporting System. The Vaccine Adverse Event Reporting System (VAERS) is a United States program for vaccine safety, co-managed by the U.S. Centers for Disease Control and Prevention (CDC) and the Food and Drug Administration (FDA).
1 Severe swelling, pain, or bleeding in the arm where the shot was given. 2  A very high fever.  Signs of allergic reaction within a few minutes to a few hours of vaccine. These may include: hives, swelling of the face or throat, difficulty breathing, rapid heartbeat, and dizziness.