Actually, there is evidence to the contrary on the age MM, in America the feeling is now older, as there are more cats that are contracting it up to the age of 2 I think. The other thing to remember with FeLV is that a cat can come into contact with it and shake it off, they aren't automatically FeLV+ - and if they do shake it off, they are immune for life, there is a special test that can be done for that, and if the cat is positive for that antibody, they dont need vaccinations. The Bristol site has the details for that test.