It is really strange about the guards not getting sick. I hadn't thought about it before, but you're right. (If they're telling the truth about that but who knows. It looks like there's been a lot of lying going on).

I told you my Gran and Great Aunt and Evelyn used to go serve at the soup kitchen every couple of weeks at Wyre. Evelyn's written to me about it and said Gran was always a fanatic about washing hands and using scourgify and so on every time they went, because Gran always told her it would be easy to pick up any diseases the muggles and muggleborns might have.