Healthy?

Thought everybody might like to hear an interesting conversion I had with one of my granddaughters last evening.

I was changing my infusion set and, as usual when we have them with us, the girls wanted to watch. I was surprised when one of them, aged 7, said "Grampy you are really healthy". Immediately curious,I asked her "Why would you say that, Pater?". "Because you take so many shots".