There's always the ole standby...
"we missed you. Where were you?"
"I was sick"
"Oh that's too bad, you missed the COs visit"
"Yea, but I didn't want to bring all my germs here and get everyone sick"
"Maybe you can catch him at the next congregation (across the city)?"
"Hey...that's a good idea. I'm going to do that"
And then you miss all next week's meetings again...