A member asked:

So if i take a hiv 4 generation combo test at 4 months after exposure (unprotected vaginal sex) will it miss the p24 antigen at this point and if so will pick up the antibodies. is it possible both will be absent at 4 months. why 6 months wait?

A doctor has provided 1 answer

Dr. Arnold Lentnek answered

4th gen neg = neg: 4th generation tests are extremely accurate. “Official” recommendation is to wait 6 months (based on older, less sensitive tests - will probably update eventually). If 4th generation is negative a 4 months, you are negative and do not have HIV.

Answered 1/28/2021

8 views

Thank

More of what we treat

Allergies

Antibiotics

Asthma

High Blood Pressure

Prescriptions

Type 2 Diabetes

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.

Get Virtual Care

For Businesses

About Us

HealthTap Online Primary Care Doctors Accepting New Patients

A member asked:

So if i take a hiv 4 generation combo test at 4 months after exposure (unprotected vaginal sex) will it miss the p24 antigen at this point and if so will pick up the antibodies. is it possible both will be absent at 4 months. why 6 months wait?

A doctor has provided 1 answer

Dr. Arnold Lentnek answered

Related Questions

A member asked:

I am worried about rare strains of HIV like type O. I got a fourth generation HIV 1 and 2 antibody/antigen in the US fro Quest diagnostic and am worried the test missed these strains. There seems to be conflicting answers. This makes me anxious?

A member asked:

I tested for hiv via lab using gen 4 antibody/antigen 25 days after possible exposure. results were negative. The sexual activity was oral with condom and I did minor fingering on vagina. Should I do retest? Or am I been paranoid?

A member asked:

If we exposed to hiv and take pep after one month of exposure.did antigen antibodies test be delayed for four months..i had tested with 4th gen test after four and half months after last course of pep.is this conclusive or delayed seroconverion?

A member asked:

Unprotected vaginal sex 7.5 months ago. Got sick. All symptoms. Test 24 times all neg. Last test was at 7 months after exposure with hiv 4 gen combo test neg. Pos ebv, pos herpes, reactive hep A at 6.5 months. She is hiv+. Do I need more test at 9mos?

A member asked:

Is there a possibility that a negative hiv combo test that was negative 5 months after unprotected sex changes to positive with no further exposure? I know the test says 99.99 accurate so I feel like its possible for it to change or miss the virus?

Sponsored Content

People also searched for:

I took a 4th gen HIV duo test 114 days after unprotected sex. Is this conclusive? do i need 2 negative results for it to be conclusive. The antigen seems to only be in the body for up to 50 days. What if i didnt have detectable antibodies by 114 days?

I do unprotected vaginal sex 4 months ago... I do hiv duo test at 28 days and antibody test at 3 months which is also negative? What is accuracy?

Have unprotected vaginal sex 2 months ago. done HIV Pcr after 37 days and combi test after 51 days and antibody test after 70 days, all came negative.

I got a 4th generation hiv test at 24 weeks and it was non-reactive. Is the 24 weeks considered 6 months and is it conclusive ? Any chances the test would miss either antibodies or p24 antigens? I want to move on from this and need closure on this?

Hi all thanks in advance! Do antibody and antigen hiv tests detect all strains? Including type O and the new VB? Tested negaafter window period can the combo miss an infection? So many different answers to this on academic sites?

Telemedicine

Primary Care

Manage Your Conditions

Women's Health

Children's Health

Men's Health

Senior Health

Wellness, Prevention & Lifestyle

Sexual Health

Mental & Behavioral Health

Travel Medicine

Urgent Care

Didn't find what you're looking for?

More of what we treat

Allergies

Antibiotics

Asthma

High Blood Pressure

Prescriptions

Type 2 Diabetes

For Businesses

Company

Health Content

Join Us

Download HealthTap

Questions?