How Accurate Are Blood Tests in Detecting STDs?
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Sexually transmitted diseases (STDs) affect millions of people worldwide, and timely diagnosis is crucial for effective treatment and preventing further spread. Blood tests are one of the common diagnostic tools for STDs, but their accuracy can vary based on the type of infection, the timing of the test, and the testing method used. This article explores how accurate blood tests are in detecting STDs and what factors influence their reliability. Accuracy of Blood Tests for Common STDs Blood tests are highly effective for diagnosing many STDs, particularly those caused by viruses or systemic infections. Here is a breakdown of their accuracy for some of the most common STDs: HIV: Modern HIV blood tests , such as antigen/antibody tests and nucleic acid tests (NATs), are highly reliable. Antigen/antibody tests can detect HIV as early as 18–45 days after exposure, with NATs identifying the virus even earlier, within 10–33 days. The accuracy of these tests exceeds 99% when performed at the...