Only five people in a community have been tested for the coronavirus and the tests all come back positive. How might the incidence rate be reported and why is it misleading?

The incident rate may be reported at $1\%$ and folks should begin to mask up$.$

The incident rate may be reported as $50\%$ and the rest of the community should leave the area.

The incident rate may be reported as $0$ and there is no need to be concerned.

The incident rate may be be reported as $100\%$ but others need to be tested to create a better sample.