Are immunochromatography test results after 28 days of exposure conclusive?

Q. Are immunochromatography test results after 28 days of exposure conclusive?

Answered by
Dr. Sushil Kakkar
and medically reviewed by iCliniq medical review team.
This is a premium question & answer published on Jan 17, 2018 and last reviewed on: Jul 11, 2023

Hello doctor,

I have had HIV (Human Immunodeficiency Virus) 1 and 2 antibody test to detect antigens p24, Glycoprotein (Gp41, and Gp120) of HIV immunochromatography after 28 days of unprotected vaginal sex, and the results are nonreactive. Does it mean I am safe from the virus? I am now two months past, and I have no symptoms.


Hello, Welcome to

This HIV (human immunodeficiency virus) screening test involves antibodies and antigens accurately. It detects the majority of those infected at four weeks, whereas its sensitivity increases between 99 and 99.9 % at six weeks. So most HIV specialists consider the results of this test conclusive at six weeks.

Hi doctor,

Thank you for the reply.

So, the test I have is accurate or not?



Welcome back to

I understand your concern.

It is accurate, but at four weeks, it would accurately detect 95 out of 100 HIV patients blood tested (95 % sensitivity) and miss out 5 HIV patients (false negative result ). However, at six weeks, it would accurately detect almost all HIV patients tested (99.9 % sensitivity). So I suggest you repeat this test for a conclusive result. Since it has been two months, you have had a risk exposure.

Was this answer helpful?


Same symptoms doesn’t mean you have the same problem. Consult a doctor now!

Related Questions:
Protection broke during insertion and I pulled out. Can STDs be passed in this period?

.. minute touch of an infected vagina can spread STDs (sexually transmitted diseases). As partner status is unknown and has high-risk factors, it is better to use prophylactic treatment. Secondly, pain in armpit has almost no relation to STD.   Read full

Please explain about the CMIA test for HIV testing.

.. the specific answers for your questions. CMIA is based on chemiluminescence principle and it is performed on an automated analyzer. It is the most effective technique nowadays to rule out HIV. CMIA can almost 100 % rule out HIV after 90 days of exposu   Read full

Cryptosporidiosis - Causes, Symptoms, Diagnosis, and Treatment

The other tests that are useful to diagnosis are: Enzyme-Linked Immunosorbent Assay: This test identifies antigens, antibodies, glycoproteins, and proteins ...   Read full

Also Read Answers From:

ideaComprehensive Medical Second Opinion.Submit your Case

Also Read

PCOS and Liver Problems
The hormonal imbalances in polycystic ovary syndrome could cause liver diseases. Read the article to know the relationship between these medical conditions.  Read more»
Inferior Alveolar Nerve Lateralization Technique
The inferior alveolar nerve lateralization technique is a surgical lateralization technique to reposition the nerve. Read the article to know more about this.  Read more»
COVID-19 and Ebola: Similarities and Differences
This article gives a comparison and broader overview of the outbreak of the two deadliest diseases that showed a greater incidence over the last two decades.  Read more»

Ask your health query to a doctor online?

Ask a HIV AIDS Specialist Now

* guaranteed answer within 4 hours.

Disclaimer: No content published on this website is intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek advice from your physician or other qualified healthcare providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website. Read our Editorial Process to know how we create content for health articles and queries.