What can a blood test tell?!

Question: for example: drinking, drug use, sickness??

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Answers: for example: drinking, drug use, sickness??

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When it comes to foreign substances like drugs, it has to specifically tested for. As far as illness, they can look for certain bacteria, viruses, etc or they can look at the way your blood cells are acting in response to an infection. blood tests can show a number of things, but it depends on which specific test the Dr. orders & what type of sample is taken
RN

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