Canine influenza is an emerging threat to all dogs.

Canine influenza virus (CIV) has been confirmed in dogs across 40 states and the District of Columbia, and its prevalence is rising.1 And because most dogs are naive to the virus, virtually every naive dog exposed will become infected.2 Clinical signs associated with CIV can be confused with canine cough making accurate diagnosis difficult. Nobivac® Canine Flu H3N8 — a killed virus vaccine from Merck Animal Health — is the first vaccine fully licensed by the USDA for canine influenza. It significantly decreases clinical signs of disease and reduces viral shedding.33
This website offers important information on canine influenza, including information on diagnosis, treatment, and prevention. If you have specific questions about canine influenza or would like additional information about Nobivac® Canine Flu H3N8, simply contact our Merck Animal Health professionals.
“Your dog may be at risk for a highly contagious flu!” says Mutt Damon, a former dog flu sufferer and spokesdog for vaccination.
Watch Mutt in his latest video, “Even Dogs Get the Flu,” to find out the signs of dog flu, its risk factors, and how to protect your pooch against it.
See how veterinarians and pet care facilities are working together to help protect dogs against CIV.
To help increase awareness about the threat of canine flu and its impact, Merck Animal Health produced a video series that features veterinarians and pet care facility owners discussing the challenges CIV can pose for pet care facilities and what can be done to reduce the chance of costly outbreaks.
Video topics include:


