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HIV test

Professionally updated: January 15, 2026

HIV, or human immunodeficiency virus, is a virus that affects the body's immune system, making one more susceptible to infections and certain types of cancer. Without treatment, HIV can develop into AIDS, which is a serious, life-threatening condition. Fortunately, there are now many effective treatments that allow many people with HIV to live long, healthy lives.

Do you need an HIV test? Book an appointment today.

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Jakob Fraes
Specialist in General Medicine, Ph.D.
Read more about HIV blood test. Everything you should know.

What is HIV?

HIV is a virus that attacks the body's immune system. Specifically, it targets CD4 cells (T cells). When HIV attacks these cells, the body becomes more vulnerable and may have difficulty fighting off diseases, becoming more susceptible to infections and certain types of cancer.

Without treatment, HIV can progress to AIDS, a serious and life-threatening condition. Fortunately, many effective treatments have become available, allowing many people with HIV to live long, healthy lives.

HIV symptoms

After being infected with HIV, various symptoms may occur. Early signs may include flu-like symptoms, such as fever, headache, and rash. In some cases, HIV shows no symptoms until later stages. Therefore, regular screening is crucial, especially if you belong to a high-risk group.

Early symptoms of HIV

  • Headache
  • Sore throat
  • Fever
  • Rashes
  • Lack of appetite
  • Swollen lymph nodes
  • Sore muscles and joints.

Late symptoms of HIV

  • Headache
  • Fever
  • Cough
  • Shortness of breath
  • Swallowing pain
  • Diarrhea
  • Weight loss
  • Poor general condition
  • Vision problems
  • Nausea
  • Vomiting
  • Stomach ache.

How do you get HIV?

HIV is primarily transmitted through unprotected sex, infected blood products, or from mother to child during pregnancy, childbirth, or breastfeeding. Over 90% of infections occur through sexual contact. HIV can also be transmitted by sharing needles or syringes with an infected person.

It is crucial to understand how the virus is transmitted in order to effectively protect yourself from infection. Early diagnosis and treatment are key to living well with HIV.

How is HIV spread?

HIV is primarily transmitted through contact with infected blood, semen, vaginal fluid, or breast milk. The most common routes of transmission include:

  • Unprotected intercourse with an infected partner
  • Sharing needles or syringes with an infected person
  • Transmission from mother to child during pregnancy, birth, or breastfeeding
  • Blood transfusions with infected blood (although this is rare in countries with modern medical systems).

What is the difference between HIV and AIDS?

HIV and AIDS are related but not the same. HIV is the virus that causes the infection, while AIDS is the most severe stage of HIV infection. AIDS is diagnosed when a person with HIV develops certain infections or when the number of CD4 cells falls to a very low level.

As the number of CD4 cells in the blood decreases, you become more susceptible to infections and cancers that would normally be fought off by a healthy immune system. If you develop one of these diseases in addition to the HIV infection itself, you have developed AIDS.

With effective treatment, many people with HIV can live long lives without developing AIDS.

How many people have HIV in Denmark?

In Denmark, approximately 6,800 people live with HIV. In recent years, there has been a decrease in the number of people diagnosed with HIV. This indicates that the HIV curve has been broken, and that we may become one of the first countries without new HIV cases.

Thanks to advanced medical treatments, most of these individuals have a good quality of life and can live long and healthy lives. However, it is important to diagnose and treat HIV early to achieve the best results.

Facts about HIV

  • HIV stands for Human Immunodeficiency Virus and is a virus that attacks the immune system.
  • The most common cause of HIV infection is unprotected sexual contact with a person who is HIV-positive.
  • It is possible to live with HIV for many years before the disease develops into AIDS.
  • Modern HIV treatment can effectively control the virus, allowing most HIV-positive individuals to live symptom-free for a long time.
  • The estimated number of undiagnosed HIV-infected people is around 500. Half of them are men who have sex with men.
  • There are relatively few AIDS diagnoses in Denmark. This is due to the effective medical treatment available for HIV.

What is an HIV test?

An HIV test is the only sure way to know if you have HIV. The test is quick, painless and anonymous. The test works by detecting the presence of HIV antibodies or virus particles in the blood.

It is recommended to get tested regularly if you are sexually active and have multiple partners, or if you are in another risk group. Early diagnosis provides access to treatment that can prevent the virus from developing into AIDS.

How an HIV test is performed

Blood test

A small amount of blood is taken from a finger prick or a vein in the arm.

Antibody and antigen test

The test looks for antibodies (the immune system's response) and antigens (viral proteins) in the blood.

Laboratory test

The blood sample is sent to a laboratory for more detailed analysis. Results may take a few days to receive.

HIV treatment

HIV cannot be cured, but it can be effectively controlled with antiretroviral therapy (ART), which helps to keep the virus in check and protect the immune system. Treatment with ART also makes it less likely to transmit the virus to others.

It is important for people with HIV to follow their treatment plan closely and take the medicine as prescribed by their doctor. Regular check-ups and tests are also part of the treatment to monitor the effect of the treatment and assess any side effects.

Although ART does not cure HIV, it has revolutionized the treatment of the disease, transforming it from a potentially fatal condition to a chronic, manageable disease for many people.

Prevention and protection against HIV

Prevention is a crucial part of the fight against HIV. This includes using condoms during sex, getting regular HIV tests, and in some cases, taking preventive medicine like PrEP. Get informed about how you can protect yourself and others, and talk to your doctor about the different preventive options.

Protect yourself from HIV

Use of condoms

Correct and consistent use of condoms during intercourse can significantly reduce the risk of HIV transmission.

PrEP (Pre-exposure prophylaxis)

PrEP is a medication that can be taken by people at high risk of HIV infection to prevent transmission.

Treatment as Prevention (TasP)

Treating HIV-positive individuals with antiretroviral therapy (ART) can lower their viral load so much that the risk of transmission to a sexual partner becomes minimal.

Avoid risky behavior

Avoid risky behaviors like unprotected sex with unknown partners or sharing needles.

Testing

Regular screening and testing for HIV is important, especially for those who are sexually active or exposed to other risk factors.

Do you need to see a doctor?

Are you concerned about your status or would you like more information about the prevention, diagnosis, and treatment of HIV? Book an appointment with one of our experienced doctors, who can provide you with the help and guidance you need.

Our team of health experts are here to support you through every stage of the process, from testing to treatment and follow-up.

Book an appointment today, and take the first step towards a healthier life.

How is HIV transmitted?

HIV is primarily transmitted through unprotected sex with an infected person, the use of infected needles or syringes, and from mother to child during pregnancy, childbirth, or breastfeeding. Transmission via blood transfusion with infected blood is very rare in countries where blood is routinely tested for HIV.

How is HIV treated?

Although there is no cure for HIV, medication (antiretroviral therapy – ART) can control the virus and prevent it from developing into AIDS. ART also helps reduce the risk of transmitting the virus to others.

What should I do if I think I have HIV?

If you have symptoms of HIV or think you may have been exposed to the virus, you should get tested immediately. The test is quick and anonymous. If the test is positive, you will be referred to a specialist who will help you start treatment as soon as possible.

Can I live a normal life with HIV?

Yes, with early diagnosis and proper treatment, people with HIV can live long and healthy lives. It is crucial to follow the prescribed medication schedule carefully and continue with regular check-ups and tests to monitor your health.