what are they?
To validate the testing and so that you know the assay has worked.
A positive control is using something that you KNOW will act in response in the tryout. A negative control is using something that you KNOW should not take action in the examination. If both turn out ok, then your ELISA, or any other trial for that matter, is working the bearing it is supposed to. If your positive control doesn't work, you are in big trouble. If the refusal control actually give you a reading, that's not quite as desperate, but indicates that other things can react within addition to the substance of interest.
medication and health guarantee correctness , is for informational purposes just
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