d7b2d801__BRD_Testing____Cattle_Network__1
[0] Serology [2] It can detect both past infection and response to vaccination [3] It doesn’t necessarily measure immunity to disease and can’t tell the difference between antibodies created by infection vs. those created by vaccination [1] 
Finds antibodies the calf has produced in response to exposure
Have We Gotten a Little Too Smart on BRD Testing? | Cattle Network
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