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).
adverse reaction in Medicine. adverse reaction adÂ·verse reaction (Äd-vÃ»rs', Äd'vÃ»rs') n. A result of drug therapy that is neither intended nor expected in normal therapeutic use and that causes significant, sometimes life-threatening conditions.