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Dog Flu (Canine influenza) is an emerging threat to all dogs.

Dog Flu - Mutt Damon

Canine influenza is a relatively new disease commonly referred to as “dog flu.” and can be caused by two different canine influenza viruses. Just like human flu is among humans, canine influenza is highly contagious among dogs. In fact, unless a dog has already had the illness and recovered, almost every dog exposed to the virus will become infected. Two different strains of canine influenza virus have been isolated in the US. Canine influenza virus H3N8 was first reported in 2003, and canine influenza virus H3N2 emerged in March 2015. These strains are not related. Therefore, dogs at risk should be vaccinated against both strains.2 This is because the viruses are relatively new, and dogs have no natural immunity to it. Nobivac® Canine Flu H3N8 was the first vaccine for canine influenza and still is highly effective against this strain. It has been clinically proven to significantly reduce the severity of influenza and the length of time that a dog is sick. Canine Infuenza Vaccine H3N2 was launched under a conditional license. The vaccine has a reasonable expectation of efficacy and safety.33 Just recently Merck Animal Health launched Nobivac Canine Flu Bivalent vaccine. This vaccine aids in the control of disease associated with Canine Influenza Virus H3N8 and H3N2 infection. Your veterinarian can advise you whether canine influenza vaccines should be added to your dog’s vaccination schedule.

This website offers important information on canine influenza, including information on treatment and prevention. If you have specific questions about canine influenza or would like additional information about Nobivac® Canine Flu H3N8, Canine Influenza Vaccine H3N2, or Nobivac Canine Flu Bivalent simply contact our Merck Animal Health professionals.