What size of induration after a tuberculin test signifies a positive result in a 16-year-old client? record your answer using a whole number. mm?

The size of induration that signifies a positive result in a 16-year-old client is larger or equal to fifteen (15) mm. A tuberculin test (or Mantoux test) is a medical tool for screening for tuberculosis. The procedure involves the injection of 5 tuberculin units intradermally and the reading of the reaction 48 to 72 hour later. If a person has been exposed to the specific bacteria, the skin will exhibit an immune response. This immune response is in a form of an induration, whose diameter is measured. The diameter in relation to the person's risk factor will determine whether the result will be positive or not.

It doesn’t show the symbol