Is this ok?

My son is 6 months old, since day 1 he's always been the type of baby to get sick very easily. This weekend we went to my in laws and my brother in law was sick with the flu so bad he couldnt even talk. I asked him to please stay away from my son and of course being the 16 year old he is he would hold him just to get me annoyed. Now 2 days later my son has a bad cough and has been super fuzzy and doesn't really sleep at night i took him to the doctor and got medicine already. Anyway, i posted this on fb ..

"NEW RULE! If you are sick with the flu please, please, PLEASE!! DO NOT carry or kiss my son!! He gets sick super easily. And it's totally ok if anyone gets offended, my son's health comes first.😞"

Is that ok? Mom's understand that seeing your baby sick is horrible specially when they dont talk or point out too what hurts or what is bothering them😞