Becoming What You Most Despise

You know that annoying guy at work, or on the train, who is coughing, sniffing and blowing his nose constantly, and rather than just staying at home to get better like a normal person, is soldiering on all martyr-like, like work is sooo important, that he simply must just push through?

I have become that guy.

I need to get over that real quick, because I really dislike that guy.