HIV and AIDS

HIV is a virus that attacks the immune system, while AIDS is the most advanced stage of HIV infection when immunity is severely weakened. With early testing and modern antiretroviral treatment, many people with HIV can live long, active lives and prevent transmission to others.

Overview

HIV and AIDS are related but not the same condition. HIV, or human immunodeficiency virus, is a virus that infects and gradually weakens important immune cells, especially CD4 T cells. AIDS, or acquired immunodeficiency syndrome, is the most advanced stage of HIV infection, when the immune system has become severely damaged and certain serious infections or cancers may develop.

HIV is transmitted through specific body fluids, most commonly during unprotected sexual contact, sharing needles or other injecting equipment, and from a pregnant person to a baby during pregnancy, birth or breastfeeding if preventive care is not used. HIV is not spread through casual contact such as hugging, sharing food, shaking hands, using the same toilet, coughing, sneezing or insect bites.

Modern HIV care has changed the outlook greatly. Antiretroviral therapy can control the virus, protect immune function and help prevent progression to AIDS. When treatment reduces the amount of virus in the blood to undetectable levels and this is maintained, HIV is effectively not transmitted through sex. Early diagnosis and consistent medical follow-up are central to staying well.

Symptoms

HIV symptoms vary depending on the stage of infection. In the first few weeks after exposure, some people develop an illness that can resemble flu or mononucleosis. Possible early HIV symptoms include fever, sore throat, swollen lymph nodes, rash, muscle aches, tiredness, night sweats or mouth ulcers. These symptoms are not specific to HIV and may be caused by many other infections.

After the early stage, HIV may cause no obvious symptoms for several years. During this time, the virus can still be active in the body and can still be passed to others if treatment is not being taken. Because a person can feel healthy and still have HIV, testing is the only reliable way to confirm infection.

When HIV is untreated and the immune system becomes very weak, symptoms may become more persistent or severe. Signs of advanced HIV or AIDS can include ongoing fever, unexplained weight loss, chronic diarrhea, repeated infections, persistent swollen glands, unusual skin or mouth lesions, severe fatigue or certain lung, brain or digestive infections. Anyone with these symptoms should receive prompt medical assessment, especially if there has been possible HIV exposure.

Causes & Risk Factors

HIV is caused by infection with the human immunodeficiency virus. The virus is present in blood, semen, vaginal fluids, rectal fluids and breast milk. It enters the body through mucous membranes, damaged tissue or direct injection into the bloodstream. Once inside the body, HIV targets immune cells and makes copies of itself, which can slowly reduce the body’s ability to fight infections if treatment is not started.

Risk is linked to exposure, not to a person’s identity or background. Situations that can increase the chance of HIV transmission include sex without condoms or other effective prevention, having another sexually transmitted infection, sharing needles or syringes, receiving untested blood products in settings without safe screening, and occupational needle-stick injuries. Babies may be exposed during pregnancy, delivery or breastfeeding if the parent has untreated HIV.

Several measures reduce risk substantially. These include regular HIV and sexually transmitted infection testing, condoms, sterile injecting equipment, treatment for people living with HIV, pre-exposure prophylaxis for people at ongoing risk, and post-exposure prophylaxis after a recent possible exposure. In pregnancy, specialist care and treatment can greatly reduce the chance of transmission to the baby.

Diagnosis

HIV is diagnosed with laboratory testing. Common tests look for HIV antibodies, HIV antigens or the virus itself. Different tests can detect infection at different times after exposure, so a negative result very soon after a possible exposure may need to be repeated. A healthcare professional can advise on the most appropriate test and timing based on the situation.

If an HIV screening test is reactive, confirmatory testing is performed before a diagnosis is made. After diagnosis, further tests assess the amount of virus in the blood, known as viral load, and the strength of the immune system, commonly measured by CD4 cell count. These results help guide treatment decisions and provide a baseline for monitoring response to therapy.

Testing may also include screening for other infections and health conditions that can affect care, such as hepatitis, tuberculosis and sexually transmitted infections. For people who are pregnant or planning pregnancy, HIV testing is an important part of prenatal care. Confidential testing and counseling can help patients understand results, protect partners and begin treatment without delay when needed.

Treatment Options

The main treatment for HIV is antiretroviral therapy, often called ART. ART uses a combination of medicines that stop the virus from multiplying. This lowers the viral load, allows the immune system to recover or remain stronger, and helps prevent progression to AIDS. Treatment is usually lifelong and works best when taken consistently as prescribed.

The right approach is decided by an infectious diseases or HIV specialist after a full assessment. The specialist considers medical history, current health, other infections, pregnancy plans, other medications, possible side effects and laboratory results. Follow-up appointments and blood tests are used to check viral load, immune function, safety and treatment effectiveness.

People with advanced HIV or AIDS may need additional care for opportunistic infections or related conditions. This may include anti-infective medicines, vaccination when appropriate, nutritional support, management of other chronic diseases, mental health care and rehabilitation if complications have affected strength, breathing or daily function. In rare situations, hospital care may be needed for serious infections or complex complications.

Prevention can also involve medicines in specific circumstances. Pre-exposure prophylaxis may be recommended for people at ongoing risk, while post-exposure prophylaxis may be considered after a recent possible exposure and should be assessed urgently. These options should always be discussed with a qualified clinician, because timing, testing and medical suitability are important.

Living With / Prognosis

Many people living with HIV lead active, fulfilling lives when the infection is diagnosed early and treated consistently. The goals of care are to keep the viral load suppressed, preserve immune function, prevent complications and support overall wellbeing. Regular follow-up helps identify changes early and adjust care safely when needed.

Daily life with HIV often includes taking treatment as prescribed, attending scheduled blood tests, maintaining vaccinations recommended by the doctor, and seeking care promptly for unusual symptoms. General health habits such as balanced nutrition, physical activity, adequate sleep, avoiding smoking and limiting alcohol can support immune and cardiovascular health. Emotional support is also important, as stigma, anxiety or depression can affect quality of life and treatment adherence.

HIV does not prevent most people from having relationships, working, traveling or planning a family, but medical guidance is important. People with HIV should discuss contraception, pregnancy, breastfeeding, partner testing, travel vaccines and medication supplies with their care team. With effective treatment and specialist care, the risk of passing HIV to partners or babies can be greatly reduced.

When to See a Doctor

A person should seek medical advice if they may have been exposed to HIV, even if they feel well. Examples include condomless sex with a partner whose HIV status is unknown, a condom break, sexual assault, sharing needles, or an occupational needle-stick injury. Post-exposure assessment is time-sensitive, so urgent care is recommended after a recent exposure.

Testing is also recommended for people with symptoms that could be linked to HIV, those diagnosed with another sexually transmitted infection, people with multiple or new sexual partners, and anyone who wants to know their HIV status. Early testing is beneficial because treatment can start before the immune system is significantly affected.

People already diagnosed with HIV should contact their doctor if they miss treatment, develop side effects, have symptoms of infection, become pregnant or plan pregnancy, or start new medications. Acibadem International’s multidisciplinary specialists and JCI-accredited hospitals diagnose and treat HIV and AIDS for international patients, with care coordinated according to each patient’s clinical needs.

Frequently asked questions

What is the difference between HIV and AIDS?

HIV is the virus that infects and weakens the immune system. AIDS is the most advanced stage of HIV infection, usually occurring when the immune system is severely damaged. With effective treatment, many people with HIV never develop AIDS.

How is HIV transmitted?

HIV is transmitted through certain body fluids, including blood, semen, vaginal fluids, rectal fluids and breast milk. The most common routes are unprotected sexual contact, sharing injecting equipment and transmission from parent to baby without preventive treatment. HIV is not spread by hugging, sharing food, casual contact or mosquito bites.

Can HIV be cured?

There is currently no widely available cure for HIV. However, antiretroviral therapy can control the virus very effectively when taken consistently. Treatment can keep the viral load undetectable, protect the immune system and help people live healthy lives.

When should someone get tested after possible HIV exposure?

A person should seek medical advice as soon as possible after a possible exposure, especially because post-exposure prevention may be time-sensitive. HIV tests have different window periods, so a clinician may recommend an initial test and repeat testing later. The exact timing depends on the type of test and the exposure details.

What does undetectable viral load mean?

An undetectable viral load means the amount of HIV in the blood is so low that standard tests cannot detect it. This shows that treatment is working well, but it does not mean HIV has been cured. When undetectable levels are maintained with treatment, HIV is effectively not transmitted through sex.

Can a person with HIV have a baby safely?

Many people with HIV can have healthy pregnancies and babies with specialist care. HIV treatment during pregnancy, careful monitoring and appropriate delivery and infant care can greatly reduce the chance of transmission. Anyone with HIV who is pregnant or planning pregnancy should speak with an HIV specialist and obstetrician.

How can HIV be prevented?

Prevention includes HIV testing, condoms, not sharing needles, sterile medical equipment, treatment for people living with HIV, and prevention medicines for people at risk or after a recent exposure. Treating sexually transmitted infections and discussing partner testing can also reduce risk. A healthcare professional can advise which prevention options fit an individual’s situation.

References

• World Health Organization
• Centers for Disease Control and Prevention
• European AIDS Clinical Society
• National Institutes of Health
• International Antiviral Society-USA

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.