New answers tagged immune-system
1
Yes, estimating the prevalence of latent tuberculosis infection using the TST is not trivial.
Use only of the TST to define latent tuberculosis infection requires specification of a cut-point for positivity. There is a trade-off between sensitivity and specificity when selecting this cut-point. In prevalence surveys, this is usually >10 mm induration.
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3
The primary immune response (when you first get exposed) is different from the secondary (from the memory cells). In the primary response, different antibodies are used (mostly IgM). The secondary immune response mostly uses IgG antibodies. This secondary response is stronger and antibodies are detected for longer.
The term primary and secondary are ...
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