A child entering the school for the first time was given Mantoux test in order to determine if there was a need for revaccination. The reaction was negative. What is the meaning of this test result?

Answer options

1. Presence of antibodies to the tuberculosis bacteria
2. No cell-mediated immunity to tuberculosis
3. Availability of cell-mediated immunity to tuberculosis
4. No anti-toxic immunity to tuberculosis
5. No antibodies to the tuberculosis bacteria

Explanation

A positive test would indicate that the boy has antibodies to M. Tuberculosis but the child had a negative reaction.