Wow, that was really interesting and informative. But it kinda makes people like me not know what to do... I have an indoor/outdoor cat. I want him to be fully protected against things he can contract outdoors- I haven’t gotten him his Feline Leukemia vax though, and I don’t know wether to get it or not. I know he has a higher risk of contracting it because he goes outside. I guess there are pros and cons to everything.