How Does Cross Reactivity Affect Diagnostic Tests?
Certain diagnostic tests, such as those for hormone levels or infectious diseases, may exhibit cross reactivity. For example, pregnancy tests that measure human chorionic gonadotropin (hCG) can sometimes show false positives due to cross-reactivity with other substances like LH or certain medications. Similarly, tests for sexually transmitted infections might show false positives or negatives because of cross-reactivity with other pathogens.
