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Complement

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Describes how complement tests such as C3 and C4 are used, when complement tests are ordered, and what the results of a complement test might mean
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Hair Follicle Drug Test

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Considering a hair follicle drug test? Learn about how long drugs can be detected in the hair, which drugs can be identified, and how hair testing works.
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Influenza Tests

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The flu is a respiratory illness triggered by infection with an influenza virus. Our guide explains the types of flu tests and when and how they may be used.
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Frequently Asked Questions

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Have questions about laboratory testing? We're here to help you understand your tests and what results might mean for you.
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Opioid Testing

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Getting tested for opioid use? Opioid testing detects evidence of both illegal and prescription opioids. Learn more about opioid testing in our guide.
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Policies

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Testing.com has made every effort to provide a website that observes best practices in developing a health information resource on the Internet, and, in particular, one that respects the privacy of its users, as reflected in the policies below. Should you have any questions about these policies, please contact us.
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Transfusion Medicine

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Learn about transfusion medicine and blood banking. Transfusion medicine is the branch of medicine that is concerned with the process of collecting (donation), testing, processing, storing, and transfusing blood and its components. It is a cornerstone of emergency and surgical medicine. Blood banks are sections of clinical laboratories that process, test, and distribute blood and its components.
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The Best At-Home Chlamydia Tests of 2023

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  • At-Home Testing
Chlamydia is a common STD that can cause complications if left untreated. Learn about options for testing at home and how to understand at-home test results.
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CBC Blood Test (Complete Blood Count)

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The complete blood count is an essential test that counts the number, size, and types of cells in your blood. It provides an indication of your overall health.
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