From what I understand there has been a serious outbreak in my area, Lancaster County, PA, at kennels, dog parks and grooming salons. It was on the local news to protect your dogs. I just called my vet and they recommended that I get it for my girls right away, so I scheduled appointment for this week for the first vaccine and then they will get a booster in 2 weeks. My vet just got this vaccine in stock 2 weeks ago. Most of the local kennels are now requiring this before boarding too. It is frightening because there have been fatal cases in my area.