Non-Species Specific · Epidemiology · Epidemiology
Epidemiology — Non-Species Specific
High-yield epidemiology presentations in non-species specific cases, drilled with NAVLE-style vignettes.
Predictive values depend on prevalence: as prevalence falls, true positives become rare relative to false positives, so PPV drops even though sensitivity and specificity are unchanged. This is why positives in low-prevalence screening require confirmatory testing.