Final answer:
The nurse should first ask the client to describe any fears and address them appropriately.
Step-by-step explanation:
The nurse should first ask the client to describe any fears.
By doing so, the nurse can better understand the client's concerns and address them appropriately. This will allow for open communication and the opportunity to provide education and reassurance to the client.
Once the client's fears are identified, the nurse can then provide information about HIV transmission and the precautions taken within the psychiatric unit to ensure safety for all patients.