Patients with tuberculosis pose the greatest risk for transmitting the disease when they:

Patients with tuberculosis pose the greatest risk for transmitting the disease when they:

• A. Sleep.
• B. Exercise.
• C. Eat.
• D. Cough.

Answer: (D)

Airborne transmission is the key idea here: tuberculosis spreads through tiny droplets that can linger in the air. When a person with active TB coughs, they release aerosols containing the bacteria, which can be inhaled by others nearby, especially in enclosed, poorly ventilated spaces. Breathing during sleep, or during exercise or eating, doesn’t actively propel infectious particles into the air to the same extent as a coughing episode. So the moment when contagiousness is greatest is during coughing, when the person sheds more infectious material into the surrounding air.

Airborne transmission is the key idea here: tuberculosis spreads through tiny droplets that can linger in the air. When a person with active TB coughs, they release aerosols containing the bacteria, which can be inhaled by others nearby, especially in enclosed, poorly ventilated spaces. Breathing during sleep, or during exercise or eating, doesn’t actively propel infectious particles into the air to the same extent as a coughing episode. So the moment when contagiousness is greatest is during coughing, when the person sheds more infectious material into the surrounding air.