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A member asked:
Ppd test and after 3 days, the induration measures 8mm. do you think an induration of 8mm is positive?
A doctor has provided 1 answer
That actually: depends. Please check the reference to see which factors apply to you. However - who checked the induration? I have always used the ballpoint pen method to determine parameters accurately. Feeling just with fingers alone may be inaccurate. REF: https://www.cdc.gov/tb/publications/factsheets/testing/skintesting.htm
Answered 11/28/2017
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