Hi. When does HIV show up in your blood? I had a test at 31 days that came back neg. I am heterosexual. The other site said 90 percent of tests will be positive 3 to 4 weeks after infection.

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Home / Answered Questions / Hi. When does HIV show up in your blood? I had a test at 31 days that came back neg. I am heterosexual. The other site said 90 percent of tests will be positive 3 to 4 weeks after infection.

Hi. When does HIV show up in your blood? I had a test at 31 days that came back neg. I am heterosexual. The other site said 90 percent of tests will be positive 3 to 4 weeks after infection.

The standard HIV blood test we use in BC is 95% accurate after 6 weeks, but it can take up to 3 months to become positive.

You can takea a look at our STI at a glance chart for information on STI testing and how long to wait before getting a test.

Please leave a comment to let us know if this answers your question or if you need more information.

Health Nurse

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This answer was posted on December 23, 2012.