Do monks sneeze and cough?

Sneezing and coughing are voluntary reactions provoked by viruses in order to propagate and reach as many hosts as possible. If a person has a high sense of control of his or her own reactions, they can perfectly control both impulses. Are monks encouraged to observe the rising and passing of the impulse to sneeze or cough, but not give in? Strictly speaking both are propagating disease and generate bad kamma, since you're infecting other people.