A public health nurse is developing a protocol for treatment of inhalation anthrax in the event of widespread public exposure. Which of the following information should the nurse plan to include?

The anthrax vaccine is ineffective following direct anthrax exposure.

Prophylactic treatment should be provided to clients for 10 days following exposure to anthrax.

Ciprofloxacin should be administered for asymptomatic clients who were directly exposed to anthrax.

Manifestations of anthrax infection appear within 3 days of exposure.