A 24-year-old female asked:
Positive tb skin test, took a blood test & tested negative for tb & hiv, had a child the year before the positive skin test & had blood drawn when i became pregnant and i didnt have anything . i did have strepb though. whyd i get a positive test ?
2 doctor answers • 3 doctors weighed in
Pediatrics 46 years experience
False positives: Almost every screening test we have will have false positives. Screening tests are usually cheaper & easier to do while confirmatory tests are more expensive & involved. Screening tests are usually less likely to be falsely negative, which allows us to identify populations that are clear while focusing spending on those more likely to be confirmed. Having the kid previously didn't matter.
8 viewsAnswered Jan 27, 2021
Pathology 49 years experience
8 viewsReviewed Jan 29, 2021
Last updated Jan 29, 2021
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