Background: Vaccination is an important part in cats? welfare. It both helps to prevent the individual cat from catching a disease or lessen the symptoms of it, and protects the entire cat population from an epidemic. It is the cat owner who makes the decision to vaccinate or not. Understanding the cat owners? perspective regarding vaccination may improve communication between the owner and the veterinary nurse, which may lead to a higher vaccination rate among cats.

Vaccinology is an ever expanding field. As a member of the veterinary staff it is important to stay up to date with the continuous new scientific data and recommendations that affect the care that our companion animals receive at the veterinary clinic. This paper presents adverse vaccination reactions, their cause, risk factors and suggestions how we can minimize the risk of adverse vaccine events in dogs. Dog owners in Sweden were allowed to answer a questionnaire about adverse events following vaccination. Lethargy, edema and pruritus were among the most frequently seen adverse effects.