Richard came in to tell people he's afraid of catching the swine flu from coughing/sneezing passengers on the subway - but after catching sight of Richard's oozing arm wound, Howard thought he had more to worry about: "Look at his arm. He's got MRSA! Go to a doctor...go to an emergency room...cover it up and get out of here."
Later, Richard came in to say he was just teasing Howard: "You've been Richard Christy'd...that was all special effects make-up." Howard displayed his usual distaste for being pranked: "Don't ever prank me again. Don't f'ing waste my time...If you do that again, I'll fire you."