Dear_________

Co-worker, please cover your friggin mouth when you walk around coughing ALL DAY! I don't appreciate walking in the same door you're coming out of and having you cough your nasty germs in my face!

Seriously, what is wrong with people?

Sincerely,
Your disgusted co-worker

You should teach her to cough like the kids....into your elbow. That way you're not contaminating everything you touch