A client with a sinus infection blows his nose in a facial tissue and asks the nurse to dispose of it. The nurse puts on gloves before touching the used facial tissue because she knows that the facial...

A client with a sinus infection blows his nose in a facial tissue and asks the nurse to dispose of it. The nurse puts on gloves before touching the used facial tissue because she knows that the facial tissue is identified as which of the following links in the chain of infection?

1. Portal of entry

2. Mode of transmission

3. Portal of exit

4. Susceptible host