What to know first
A complete HIV testing guide, from choosing a test to next steps after a result
- Testing is the only way to confirm your HIV status.
- The sample type and time since exposure affect when HIV can be detected.
- A reactive screening result needs confirmatory testing in a healthcare setting.
The only way to know for sure whether you have HIV is to get tested. Testing is the only way to confidently know your status. Once you know your HIV status, you can make informed and safe decisions about your health – whether it’s for prevention, treatment, or protecting those you care about.
In the United States, CDC recommends that everyone between the ages of 13 to 64 get tested for HIV at least once in their lifetime as part of routine health care. More frequent testing is recommended for those who engage in behaviors that may increase their risk of HIV. Even if you and your partner are in a monogamous relationship, it’s important that both of you get tested to clearly understand each other’s HIV status.
When Is an HIV Test Useful?
Testing can be part of routine sexual health care, before starting or changing a relationship, during pregnancy, after sharing injecting equipment, or after sex when you are unsure about HIV prevention. You do not need symptoms to request a test because HIV cannot be confirmed or ruled out by appearance or symptoms alone.
Why Timing and Test Type Matter
Every HIV test has a window period. A result taken very soon after an exposure may be negative even when infection is present. Tell the provider when the exposure happened and whether you have used PrEP, PEP, or other antiretroviral medicines so they can recommend the right test and any repeat testing.
Plan the Next Step Before You Test
Choose a service where you can ask how results are delivered, how your information is protected, and where confirmatory testing or treatment is available. If an exposure happened within the past 72 hours, seek urgent PEP assessment instead of waiting for a later routine test.
What should I do after receiving my result?
Before leaving, ask whether this is a screening or confirmed result, and whether the test covers your latest exposure. An early negative result may need a repeat test. A reactive screen needs confirmation. If HIV is confirmed, you can enter care without waiting to feel unwell. Keep the follow-up date and a contact for questions, so the result leads to an actual care plan.
How do I choose a service and prepare to book?
Use the clinic list to check the service, location and opening times. Ask what test is offered, when results are available, the total charge and how results are shared privately. Check whether confirmation is provided there or through a referral. Choose somewhere you can return for follow-up. For a step-by-step explanation of preparation and detection windows, continue to the dedicated testing guide.
Compare the three main HIV test types
The ranges below are general estimates without antiretroviral use. Follow the test instructions or a clinician's advice.
| Test type | What it detects | Typical detection window after exposure |
|---|---|---|
| NAT | Viral genetic material | About 10–33 days |
| Lab antigen/antibody test using venous blood | p24 antigen and antibodies | About 18–45 days |
| Antibody test | Antibodies to HIV | About 23–90 days |
