Getting Tested for HIV

Testing is the only way to know your HIV status for certain. Testing today is faster, more accurate, and more accessible than ever, and knowing your status, either way, puts you in control of your health.

Types of HIV Tests

There are a few main types of HIV tests, and they differ mainly in how soon after a possible exposure they can detect the virus.

• Antibody tests look for the antibodies your immune system creates in response to HIV. These can be done with a blood draw or a rapid finger-stick/oral swab test, and many give results in as little as 20 minutes.

• Antigen/antibody tests look for both HIV antibodies and a viral protein called p24 antigen. These are commonly used in labs and can detect infection somewhat earlier than antibody-only tests.

• Nucleic acid tests (NAT), also called RNA tests, look for the virus itself in the blood. These can detect HIV earliest after exposure but are typically reserved for specific situations, such as a recent high-risk exposure or unclear results from other tests.

Understanding the "Window Period"

The window period is the time between a possible exposure and when a test can reliably detect HIV. This varies by test type. Antibody tests generally take longer to detect infection than antigen/antibody or RNA tests. If you test during the window period and get a negative result, your provider may recommend retesting later to confirm.

If you've had a recent possible exposure, talk to a healthcare provider promptly. In some cases, starting PEP (post-exposure prophylaxis) within a short window afterward can prevent infection altogether.

Where to Get Tested

HIV testing is available in many settings, including:

• Primary care and OB-GYN offices

• Sexual health and community health clinics

• Health departments

• Urgent care and emergency departments

• Some pharmacies

At-Home Testing

At-home HIV test kits are also available. These typically use a finger-stick blood sample or an oral swab and give results within minutes, done in the privacy of your own home. A positive or reactive result on an at-home test should always be followed up with a confirmatory test through a healthcare provider or lab.

What Happens After Testing

If your result is negative and you're outside the window period, that's a reliable result, though your provider may suggest a testing routine based on your circumstances. If your result is reactive or preliminarily positive, it will be followed by a confirmatory test.

Key Takeaways

• Several types of HIV tests exist, differing mainly in how early after exposure they can detect the virus.

• The window period is the time before a test can reliably detect infection. Retesting later may be recommended.

• Testing is available through many healthcare settings, as well as at-home kits.

• A reactive or positive result on any test is always followed by confirmatory testing.