Hello, my father is very sick, and the doctors seem to feel there is not much time. As a result, my fiancé and I have decided to host our wedding in 3 weeks, (we were originally planning for November but have not sent save the dates). Unfortunately, my father cannot be around anyone who is sick. Is it fair to include a note with invitations asking that if someone is sick, even with a slight cold, cough, or nose drip, please do not attend in person? If not, is there an appropriate way to communicate this to guests? Thank you for your help with this matter!