STI TEST · BANGKOK
HIV Test in Bangkok
A private HIV test with a doctor who comes to your home, condo or hotel in Bangkok: 4th-generation lab testing, and a clear plan for what your result means.
Message Ovio Medically reviewed by Kewalee Rujikajorn, MD · 24 September 2026
HIV test at a glance.
- SampleBlood from a vein or a finger-prick
- Detectable from18–45 days with a 4th-gen lab test
- Early signsOften none, or a short flu-like illness
- TreatmentHighly effective daily medicine (ART)
- Who comesA doctor, to your home, condo, hotel or office
- ResultsExplained by your doctor
- PriceConfirmed before your visit
THE INFECTION
What is HIV?
- Cause
- A virus that attacks the immune system
- Also called
- Human immunodeficiency virus · HIV infection
HIV (human immunodeficiency virus) attacks the immune system, in particular the CD4 cells that help the body fight infection. Without treatment it slowly weakens the immune system over years, and the most advanced stage is called AIDS. With treatment, people living with HIV can expect a long, healthy life.
HIV passes between people through blood, semen, pre-seminal and vaginal fluids, rectal fluids and breast milk. In practice most infections come from sex without a condom or from sharing needles. It does not pass through kissing, hugging, sharing food or toilets, or mosquito bites.
The only way to know your HIV status is to test. Many people feel completely well for years after infection, which is why the World Health Organization estimates that around one in eight people living with HIV worldwide still does not know it.
Symptoms of HIV.
Some people have a short illness two to four weeks after infection, while their body reacts to the virus. It is easy to mistake for flu or a bad cold, and it passes on its own.
Early infection (weeks 2 to 4)
- Fever
- Sore throat
- Rash
- Headache
- Swollen glands
- Tiredness and aching muscles
Years later, without treatment
- Weight loss
- Recurrent infections
- Night sweats
- Long-lasting diarrhoea
- Thrush in the mouth
Many people have no symptoms at all for years. Feeling well tells you nothing about your HIV status: only a test does.
How the HIV test works.
HIV tests look for the virus itself, for your body's response to it, or both. They differ mainly in how soon after exposure they work.
4th-generation lab test (antigen/antibody)
Blood from a vein
The standard first test. It finds both the p24 antigen and antibodies, so it works earlier than antibody-only tests: usually 18 to 45 days after exposure.
Rapid test
Finger-prick blood
Results in minutes. The window is longer, 18 to 90 days, and a reactive result must be confirmed with laboratory tests.
HIV RNA (nucleic acid) test
Blood from a vein
Looks for the virus's genetic material and can work from 10 to 33 days. It is used in particular situations a doctor decides on, not as a routine replacement for the standard test.
Sources: CDC2, Thailand Department of Disease Control3, WHO1
Testing with Ovio
- Tell us what you needCall or message Ovio, privately. Say where you are in Bangkok and when suits you.
- A doctor comes to youAt your home, condo, hotel or office. The doctor asks about your concerns and recommends the right samples.
- Samples go to the laboratoryTaken there and then; for most tests the visit itself is short.
- Your result, explainedWhat it means, and what to do next if anything needs treatment or a repeat test.
Not sure which test you need?
Speak to one of our doctors. They will ask about your situation and suggest the tests, samples and timing that fit it.
When to test for HIV.
Every test has a window period: the time after exposure before it can reliably detect an infection. A test taken too early can be negative even when the infection is there.
| Test | Sample | Timing after exposure | Good to know |
|---|---|---|---|
| Laboratory antigen/antibody from a vein | Venous blood | Usually detectable 18–45 days | This CDC range applies to a laboratory test using venous blood, not every rapid test. |
| Rapid antigen/antibody from a finger stick | Finger-stick blood | Usually detectable 18–90 days | Do not substitute the shorter venous laboratory window for this test. |
| NAT / RNA | Blood | Usually detectable 10–33 days | Not a routine replacement for the standard HIV testing algorithm. CDC's range is when infection can usually be detected. |
Who should get tested
- Anyone who has had sex without a condom, or whose condom broke or slipped
- Anyone with a new partner, or more than one partner
- Anyone who has been diagnosed with another STI, especially syphilis
- Men who have sex with men: testing every 3 to 6 months is often advised
- Anyone who has shared needles or other injecting equipment
- Anyone planning a pregnancy, or starting PrEP
AFTER THE TEST
Results and next steps.
A negative result from a test taken after its window period means you did not have HIV at the time of the exposure being tested. If the exposure was recent, the doctor will tell you when to repeat the test.
A reactive (positive) screening result is not yet a diagnosis. Thailand's national guideline, like WHO's, requires further laboratory tests to confirm it. If HIV is confirmed, the next step is starting antiretroviral therapy (ART), ideally soon after diagnosis. Your doctor can refer you to HIV care and explain the options in Thailand.
Treatment works. People who take ART and keep the virus undetectable in their blood live long lives and do not pass HIV to their sexual partners.
Sources: Thailand Department of Disease Control3, WHO1, CDC2
This page is general information, not a diagnosis. If you are unwell, in severe pain or worried about something urgent, contact a doctor now or go to a hospital emergency department.
Lowering your risk.
- Use condoms, with a water- or silicone-based lubricant
- Ask a doctor about PrEP, daily or event-based medicine that prevents HIV
- After a possible exposure, start PEP within 72 hours
- Test regularly and ask partners to test too
- Never share needles, syringes or other injecting equipment
HIV testing:
your questions.
Can't see your question? Ask one of our doctors.
It depends on the test. A laboratory 4th-generation (antigen/antibody) test on blood from a vein can usually detect HIV 18 to 45 days after exposure. A finger-prick rapid test takes longer, 18 to 90 days, and an RNA test can detect it after 10 to 33 days. A test taken earlier than this can be negative even if HIV is present, so a doctor may ask you to repeat it once the window has passed.
It looks for two things at once: HIV antibodies, which your body makes in response to the virus, and the p24 antigen, a part of the virus itself that appears earlier. Detecting the antigen is why a 4th-generation test picks up infection sooner than older antibody-only tests.
Rapid tests are accurate once enough time has passed, and they give a result in minutes. Their weakness is timing: a finger-prick rapid test has a longer window period than a lab test on venous blood. A reactive rapid result always needs confirmation with further laboratory tests before anyone is diagnosed with HIV.
Don't wait for a test. Post-exposure prophylaxis (PEP) is a short course of HIV medicines that can prevent infection, but it has to start as soon as possible and within 72 hours of the exposure. Go to a hospital emergency department or a clinic that provides PEP today. Testing still matters, and you can test with Ovio afterwards, at the times your doctor recommends.
A negative result is reliable for exposures that happened before the window period of the test you took. It does not cover a recent exposure still inside the window, or any exposure after the test. If you took PEP or PrEP, the timing of follow-up tests is different, so your doctor will set the dates.
Yes. An Ovio doctor can come to your hotel, condo, home or office in Bangkok, take the blood sample there and talk you through the result and next steps. Nothing needs to be said to the hotel beyond what you choose.
Yes. Antiretroviral therapy (ART) stops the virus from multiplying. According to the World Health Organization, people living with HIV who take ART and have no detectable virus in their blood do not pass HIV to their sexual partners. Starting treatment early protects your own health and your partners.
MEDICALLY REVIEWED
Kewalee Rujikajorn, MD
General Practitioner, Bangkok
Reviewed 24 September 2026
Kewalee Rujikajorn is a general practitioner in Bangkok, providing outpatient care for urgent, acute and chronic illness and remote consultations through a telemedicine platform. A graduate of the Medical University of Lublin, Kewalee completed postgraduate medical training at Thammasat University Hospital and has published research in ophthalmology.
Sources.
- HIV and AIDS: fact sheetWorld Health Organization, 27 July 2026
- Getting Tested for HIVUS Centers for Disease Control and Prevention
- National Guideline on HIV, Syphilis, HBV and HCV Testing (2025)Thailand Department of Disease Control
- Antiretroviral Postexposure Prophylaxis Recommendations (2025)US Centers for Disease Control and Prevention
Ovio uses official public-health sources and reviews this page when they change. Questions about this content: info@oviowellness.com.
Speak to one of our doctors.
A doctor comes to your home, condo, hotel or office in Bangkok, talks through what you are worried about, takes the samples for your HIV test and explains what happens next.