• Tollana1234567@lemmy.today
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      4 days ago

      smallpox

      TB doesnt cause the scar like that. the tuberculin test causes a swelling, to determine if you have been infected with TB, or if you are a foreigner who had BCG vaccine.

      • somethingsnappy@lemmy.world
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        4 days ago

        No. BCG scar, which was developed as a TB vaccine. It is only efficacious in some forms of infant TB, though.

        Smallpox innoculation scars are smaller, among other things.

        Source, tb vaccine research career.

        • TheEmpireStrikesDak@thelemmy.club
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          2 days ago

          BCG definitely did leave a scar. We all had to get vaccinated again (the entire school) when my GCSE art teacher got TB and coughed all over everyone instead of staying at home. I had the skin test that showed I already had immunity, when most of the others had to have the BCG. I remember the nurse making me go behind a screen to take off my shirt so she could check for my BCG scar.

          I don’t have the scar anymore. But it was there during my younger years.

          • somethingsnappy@lemmy.world
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            2 days ago

            Oof. The skin test is not reliable. Either is revaccinating. But, they didn’t have good data on either for a long time. Not fun.

            • TheEmpireStrikesDak@thelemmy.club
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              10 hours ago

              I’ve had the skin test three times, I think. I had it once as an outpatient, and then the routine one at school, and then the time the teacher got it. All came back negative.

              I had the BCG as an infant and my dad had TB before he married by mum, I don’t know if immunity is hereditary, but the nurses did ask about it. For some reason they were baffled by me not needing it.

              I checked in better lighting and there is still a faint scar on my left arm, but I can’t say for sure it’s the BCG one.

              I don’t think anyone at school actually got TB from the teacher (I doubt they’d have announced it anyway). But most of the kids in my year did get the jab, I was one of the few who didn’t. I don’t get how she didn’t have the BCG already though. She was British so I’m assuming she was raised here. This was in 1998 and she was in her 20s or 30s.

        • Successful_Try543@feddit.org
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          3 days ago

          I wouldn’t say they are smaller, but they look different. I’m not an expert, but I’d say the two upper scars are from the two mandatory smallpox vaccinations and the lower from the (likely also mandatory) bcg injection.

          Three vaccine scars on the arm of a Dutch woman in her 20s. Photo 1970