I would talk to your doctor and if it's true that all members need to be treated than yes I think it's fair that you request this of her.

However, I dont think it's fair to charge her if you do have it and need to close. Do you charge every patient A when illnesses go around and you catch it? I don't, which is why I don't think it's fair.....even though it would be really nice too sometimes!

Hopefully you don't have it!