A is for Animator

Interesting but perhaps misleading? Insulin is not a vaccine, whether delivered as an injection or a nasal spray. Insulin is a hormone basically - about the only known hormone that does not end up raising blood glucose levels. Insulin delivered prophylactically might make the pancreas work less hard in delivering insulin but I don't see how it could keep the virus that causes Type 1 diabetes from attacking insulin producing cells. The virus does not attack insulin per se, it attacks the beta cells that produce insulin. The fact that "extra" insulin is delivered nasally should not have an effect on occurence of diabetes unless by simple fact of having more insulin on-board, the pancreas is made more robust and better able to fight the virus. Still, taking insulin via a nasal spray does not qualify, by definition, as a vaccine. There must be more to the story or perhaps some group is desperate for research funds as often happens this time of year and is hyping there project.