McCoy was coughing almost constantly now as he made his way down the corridor. He kept his face tucked into the crook of his elbow, but that honestly wasn't helping much at all.

"Neither are you," he shot back (interspersed with coughs) before he even saw Spock. When he was close enough to actually help, he put his hand under Spock's elbow and used the leverage to make Spock lean on him a bit. "C'mon."