Coughing, that is the worst. You're on the train and the fit comes over you. Best not to try to suppress, for that only makes matters worse. You hack and wheeze up a lung. Some riders try to ignore you, others stare daggers at you as though you are deliberately trying to make them sick, while still others, offer you a cough drop.
Coughing, that is the worst.
Or no, worst than coughing is the sneak attack sneeze. That sneeze that results in a big wad of snot shooting out your nose, and dangling down over your lips, chin. All before you were able to grab a tissue from the pack . . . you left on your desk.