Considering the risk of biological threat infections, healthcare providers need

Considering the risk of biological threat infections, healthcare providers need to be alert to illness patterns that could indicate an unusual infectious disease process. Which of the following would indicate a possible biological infection?
Standard Text: Select all that apply.
1. Patients present with symptoms of a rare disease.
2. The disease pattern is inconsistent with the age of the patient.
3. Multiple patients presenting with viral like symptoms.
4. Patients are all coming from the same geographic area.
5. Patients are all over the age of 39, indicating a smallpox exposure.