<prompt> True about Mantoux test -5 cm always veUsually -ve after treatmentPositive reacion in children 2 yrs is not impoant than adultUsually read after 48-72 hours  <response>: The result of tuberculin test is read after 48-96 hours but 72 hours 3rd day is the ideal. Tuberculin reaction consists of erythema and induration.reaction exceeding 10 mm are considered ;positive;. Park;s textbook of preventive and social medicine,K.Park,23rd edition,page no:185 p 