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time, the risk declines. In the United States, 82,269 children between 1to 18 years of age who reacted positively to the tuberculin skin test were followed for 20 years (Comstock et al. 1974). Two incidence peaks of active disease where identifiedat ages 1 4 years,

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time, the risk declines. In the United States, 82,269 children between 1to 18 years of age who reacted positively to the tuberculin skin test were followed for 20 years (Comstock et al. 1974). Two incidence peaks of active disease where identifiedat ages 1 4 years,

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Please fill in the following form or email us to get more details [email protected] , we will reply to you within 24 hours.