Testing basics

If a person tests negative for HIV during the four week to three month window period, the negative result still cannot be considered confirmatory or accurate. During the window period, a negative test may result because the body has not produced enough HIV antibodies to be measured by a standard HIV blood test. Only after the window period of three months has passed, and providing the individual has not continued to engage in unprotected risk activities during the window period, should negative HIV test results be considered accurate.

From the moment HIV enters a person's body, it takes time for the body's immune system to develop enough HIV antibodies to be measurable by a standard HIV test. The period of time required for the body to produce enough HIV antibodies to become detectable by a standard HIV test is called the "window period". Tests currently administered in British Columbia have a "window period" which can last anywhere from four weeks to three months.

Even if a person has no risk factors for HIV infection they may still want to get tested. For many people, HIV testing is something that they choose to do regularly for their own personal reasons. Encouraging everyone to get tested is good practice and a great way to reduce HIV-related stigma. It also encourages responsibility and self-care around HIV prevention.
Some examples of why people choose to test for HIV:

If you think that you have been engaging in activities that put you at risk for HIV transmission, you may want to get tested. You may consider testing if: