The Nobivac Canine Flu Bivalent vaccine protects against diseases associated with canine influenza virus H3N8 and canine influenza virus H3N2. The canine flu is highly contagious and causes respiratory infections in dogs. Recommended for healthy dogs 7 weeks of age or older. Not for use in pregnant dogs. Helps control canine influenza H3N8 and H3N2 Killed virus Injectable vaccine For dogs 7 weeks of age and older Protects against canine influenza outbreaks Made in the USA Nobivac is a registered trademark of Intervet Inc., d/b/a Merck Animal Health, a subsidiary of Merck & Co. Inc.