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Be discreet when coughing or yawning. These are necessary physical functions. However, when done with a wide open mouth, besides being unattractive and distracting, they are also unhealthy. Germs can be easily transmitted from one person to another in this manner. Clients are seeking information or some kind of assistance, not an illness. When coughing or yawning, cover the mouth; if possible use a tissue, and turn away from those around you.