When participating in an affair its really common courtesy to keep your germs and sicknesses to yourself.  If you are sick don’t meet with your partner.  The last thing they want is to go home with a cold or a flu bug.  Not only is it a drag for them but a drag for their whole household.  Plus being with someone who is sick is a big turn OFF!  The last thing you want to do is get physical with someone who is ill.  The Flu is abundant  this year as well as the stomach flu which is the biggest they have seen.   Its best to wait till  you both feel better and spread the love not the germs.