Bordetella and Parainfluenza are two of the viruses that causes kennel cough. Kennel cough is a general term used to describe an infection that causes a bad cough as the major symptom. There are more than two virus that cause kennel cough, but the two in the vaccine are the main ones we see. This is an intranasal vaccine that MUST be given in the nose. Can be done at 6-8 weeks and only needs yearly boosters.