JoAnn has a cold. She is coughing up mucus (a respiratory secretion). JoAnn's lungs are the in the chain of transmission. The mucus from her cough is the in the chain of transmission.
3 answers
JoAnn's lungs are the source of transmission in the chain of transmission. The mucus from her cough is the mode of transmission in the chain of transmission.
JoAnn has a cold. She is coughing up mucus (a respiratory secretion). JoAnn's lungs are the in the chain of transmission. The mucus from her cough is the in the chain of transmission.
JoAnn's lungs are where the pathogen is located, making them the source of transmission in the chain of transmission. The mucus from her cough is the mode of transmission in the chain of transmission as it contains the pathogen and can spread it to others through contact or droplets.