<prompt> Which of the following is not true about the Tuberculin test -It is only tool available for estimating the prevalence of TB in a communityInduration of 10 mm indicates a positive testIt is a specific testNew cases occur more commonly in patients who are tuberculin reactors  <response>: The validity of tuberculin test is subject to variability. It is limited by lack of specificity Reference; Park;s Textbook of preventive and social medicine, 24th edition.Pg no. 196 