Hiv Aids

What is HIV/AIDS?

HIV/AIDS is a term that combines two related but different things. HIV stands for human immunodeficiency virus. It is a virus that attacks the immune system, the body’s natural defense against infection. Over time, if it is not treated, HIV weakens the immune system so much that the body can no longer fight off infections and certain cancers. AIDS stands for acquired immunodeficiency syndrome. It is the most advanced stage of HIV infection, when the immune system has been badly damaged.

When people ask “what is HIV/AIDS,” the key point to understand is that HIV is the infection and AIDS is a late stage of that infection. Not everyone with HIV develops AIDS. With modern treatment, most people who are diagnosed early and take their medication as prescribed can keep the virus under control and never reach the AIDS stage.

HIV can affect anyone, regardless of age, sex, sexual orientation, or background. It is found in every region of the world. Once a person has HIV, the virus stays in the body for life, because there is currently no cure that removes it completely. However, HIV is now considered a manageable long-term condition when treated. In many hospital systems, including Acibadem, the Infectious Diseases Department is usually the unit responsible for HIV testing, treatment, and long-term follow-up.

Symptoms of HIV/AIDS

HIV/AIDS symptoms vary a great deal from person to person and depend on the stage of infection. Some people have no symptoms for many years. This is one reason why testing is so important: you cannot tell whether someone has HIV by looking at them or by how they feel.

Common symptoms that may appear at different stages include:

• Fever and chills
• Sore throat
• Swollen lymph nodes (small glands in the neck, armpits, or groin that may feel like lumps)
• Rash, often on the trunk of the body
• Muscle aches and joint pain
• Tiredness that does not improve with rest
• Night sweats
• Mouth ulcers or thrush (a white coating in the mouth caused by a yeast infection)
• Diarrhea that lasts more than a few days
• Unintended weight loss
• Repeated or unusual infections

Stage 1: acute HIV infection

Within the first few weeks after the virus enters the body, many people develop a flu-like illness. Doctors call this acute HIV infection or seroconversion illness. Symptoms may include fever, sore throat, rash, swollen lymph nodes, headache, and tiredness. Because these symptoms look like many other common viral illnesses, they are often not recognized as HIV. Some people have no symptoms at all during this stage. The amount of virus in the blood is very high at this time, which means the risk of passing HIV to others is also high.

Stage 2: chronic HIV infection

After the early illness settles, HIV enters a long stage that is sometimes called clinical latency or chronic HIV infection. The virus is still active and is slowly damaging the immune system, but many people feel well and have few or no symptoms. Without treatment, this stage may last several years. Some people notice persistent swollen lymph nodes, tiredness, or more frequent minor infections during this time.

Stage 3: AIDS

If HIV is not treated, the immune system eventually becomes so weak that serious illnesses develop. This stage is AIDS. Symptoms at this stage are often caused by opportunistic infections, which are infections that take advantage of a weakened immune system and would rarely cause serious illness in a healthy person. Examples include certain types of pneumonia, tuberculosis, severe fungal infections, and some cancers such as Kaposi sarcoma and certain lymphomas. Symptoms may include rapid weight loss, recurring fever, extreme tiredness, prolonged diarrhea, sores in the mouth or on the skin, memory problems, and shortness of breath.

Causes and risk factors

When it comes to HIV/AIDS causes, there is only one: infection with the human immunodeficiency virus. AIDS is caused by untreated or inadequately treated HIV infection that has progressed over time. The virus spreads through certain body fluids from a person who has HIV, mainly blood, semen, pre-seminal fluid, rectal fluids, vaginal fluids, and breast milk.

The most common ways HIV is transmitted include:

• Sexual contact without a condom or other protection, especially anal or vaginal sex
• Sharing needles, syringes, or other equipment used to inject drugs
• From mother to child during pregnancy, childbirth, or breastfeeding, if the mother is not on effective treatment
• Transfusion of infected blood or blood products, which is now rare in countries with routine blood screening
• Needlestick injuries in healthcare settings, which is uncommon

It is just as important to know how HIV is not spread. HIV does not spread through saliva, tears, sweat, hugging, shaking hands, sharing food or drinks, sharing toilets, mosquito bites, or casual contact. Kissing is not considered a risk unless both people have open, bleeding sores in the mouth.

Risk factors

Certain situations increase the chance of acquiring HIV. These include:

• Having sex without a condom, particularly with a partner whose HIV status is unknown
• Having another sexually transmitted infection, which can make it easier for HIV to enter the body
• Injecting drugs and sharing equipment
• Having many sexual partners
• Receiving medical care or tattoos with unsterilized equipment
• Being born to a mother with untreated HIV

Diagnosis of HIV/AIDS

HIV/AIDS diagnosis relies on laboratory tests. A doctor cannot confirm HIV from symptoms alone, because the signs are so similar to other conditions. The main tests are:

• Antibody tests. These look for antibodies, which are proteins the immune system makes in response to HIV. They can be done on blood or on fluid from the mouth. Rapid versions can give a result in a short time, but antibodies may take several weeks to develop after infection, so a very recent infection can be missed.
• Antigen/antibody tests. These detect both antibodies and a piece of the virus itself called the p24 antigen. They can usually pick up infection sooner than antibody-only tests and are commonly used as the first-line laboratory test.
• Nucleic acid tests (NAT), also called viral load tests. These detect the genetic material of the virus in the blood. They can identify infection earliest of all and are also used to measure how much virus is present, but they are more expensive and are usually reserved for specific situations.

If a first screening test is positive, a second, different test is performed to confirm the result. A diagnosis of HIV is only made after confirmation. If a test is negative but exposure was very recent, your doctor may recommend repeating the test after the window period, which is the time between infection and when a test can reliably detect it.

Tests after diagnosis

Once HIV is confirmed, further tests help doctors understand the stage of infection and plan treatment. These include:

• CD4 count. CD4 cells are a type of white blood cell that HIV attacks. Counting them shows how strong the immune system is. A very low CD4 count is one of the criteria doctors use to diagnose AIDS.
• Viral load. This measures the amount of HIV in the blood and is used to track how well treatment is working.
• Drug resistance testing. This checks whether the particular virus is resistant to any medications, which guides the choice of treatment.
• Screening for other infections such as hepatitis B and C, tuberculosis, and other sexually transmitted infections.

AIDS is diagnosed when a person with HIV either has a CD4 count that falls below a defined threshold or develops one of a list of specific opportunistic infections or cancers, regardless of CD4 count.

Treatment options for HIV/AIDS

HIV/AIDS treatment options have changed enormously over the years. There is still no cure that removes the virus from the body, but effective medication can control it so well that the virus becomes undetectable in the blood, the immune system recovers, and life expectancy approaches that of people without HIV.

Antiretroviral therapy (ART)

The standard treatment for HIV is antiretroviral therapy, often shortened to ART. This involves taking a combination of medicines, usually every day, that block the virus at different points in its life cycle. Combining drugs from different classes helps prevent the virus from becoming resistant. Many people today take a single combination tablet once a day. Long-acting injectable forms given every one to two months are also available in some settings for people whose virus is already well controlled.

Current guidelines recommend starting ART as soon as possible after diagnosis, regardless of how strong the immune system is at the time. Early treatment protects the immune system, reduces the risk of complications, and prevents transmission to others. Once the viral load has been undetectable for a sustained period and stays that way, HIV cannot be passed on through sex. This is often described as “undetectable equals untransmittable.”

ART works only if taken consistently. Missing doses allows the virus to multiply and may lead to drug resistance, which can make future treatment more difficult. Your doctor may adjust the combination if side effects occur or if the virus does not respond as expected. Common side effects can include nausea, tiredness, headache, or sleep disturbance, and many of these improve over the first few weeks.

Preventing and treating opportunistic infections

People with a low CD4 count may be prescribed additional medicines to prevent specific infections until the immune system recovers. If an opportunistic infection or a related cancer has already developed, it is treated in its own right, with antibiotics, antifungal or antiviral medicines, or cancer treatment, alongside ART.

Supportive care

Treatment is not only about tablets. Regular monitoring of viral load and CD4 count, vaccinations, screening for other health conditions, nutritional support, mental health care, and help with adherence are all part of standard HIV care. Surgery is not a treatment for HIV itself, although people with HIV may need surgery for other reasons and can generally have it safely when the virus is controlled.

Prevention as part of treatment

Two forms of medication are used to prevent HIV in people who do not have it. PrEP (pre-exposure prophylaxis) is a medicine taken by people at ongoing risk before possible exposure. PEP (post-exposure prophylaxis) is an emergency course of medicine started as soon as possible, and within 72 hours, after a possible exposure. Your doctor can advise whether either is appropriate.

Living with HIV/AIDS and outlook

Living with HIV today is very different from what it was in the early years of the epidemic. For most people who are diagnosed before serious immune damage occurs and who take ART consistently, HIV is a chronic condition that can be managed for decades. Many people work, have relationships, and raise families. With effective treatment during pregnancy, the risk of passing HIV to a baby is very low.

The outlook depends on several factors, including how early the diagnosis is made, how consistently treatment is taken, whether other health conditions are present, and access to ongoing care. People diagnosed at a late stage, with AIDS-defining illnesses, face a more difficult situation, but even then the immune system can often recover substantially once treatment begins.

Long-term follow-up usually involves blood tests every few months at first and then less often once the virus is stable. Because people with HIV are living longer, attention has shifted toward general health: managing blood pressure, cholesterol, bone health, and mental well-being, and reducing smoking and alcohol use. Stigma remains a real challenge for many people, and counseling or peer support groups can be helpful. Telling sexual partners about a diagnosis is an important step, and healthcare teams can offer guidance on how to do this.

Frequently asked questions

What is the difference between HIV and AIDS?

HIV is the virus that infects the body and damages the immune system. AIDS is the most advanced stage of HIV infection, diagnosed when the immune system is severely weakened or when certain serious infections or cancers develop. A person can have HIV for many years without having AIDS, and with effective treatment many people never progress to AIDS.

What are the first HIV/AIDS symptoms to look for?

The earliest symptoms, when they occur, usually appear two to four weeks after infection and resemble the flu: fever, sore throat, swollen glands, rash, and tiredness. Many people have no early symptoms at all. Because these signs are not specific to HIV, the only reliable way to know is to be tested.

How is an HIV/AIDS diagnosis confirmed?

Diagnosis is made with blood or oral fluid tests that detect antibodies to the virus, parts of the virus itself, or its genetic material. A positive screening test is always confirmed with a second test. After confirmation, CD4 count and viral load tests help doctors stage the infection and plan treatment.

Can HIV/AIDS be cured?

At present there is no cure that completely removes HIV from the body. However, antiretroviral therapy can suppress the virus to undetectable levels, allow the immune system to recover, and prevent transmission to others. Research into a cure continues, but for now treatment is lifelong.

What are the main HIV/AIDS treatment options?

The core treatment is antiretroviral therapy, a combination of medicines taken daily or, in some cases, by long-acting injection. Treatment also includes preventing and treating opportunistic infections, regular monitoring, vaccinations, and support for overall health. Your doctor may adjust the specific medicines based on side effects, other conditions, and resistance testing.

Can a person with HIV have a normal life expectancy?

Many people who start treatment early and take it consistently can expect a life span close to that of people without HIV. Outcomes vary depending on the stage at diagnosis, adherence to treatment, and other health factors, so no guarantee can be made, but the outlook has improved dramatically compared with the past.

How can HIV be prevented?

Using condoms correctly, not sharing injection equipment, taking PrEP if at ongoing risk, and using PEP promptly after a possible exposure all reduce the chance of infection. People with HIV who take treatment and maintain an undetectable viral load do not pass the virus on through sex. Regular testing helps people know their status and act early.

When to see a doctor

Consider asking for an HIV test if you have had a possible exposure, if you have never been tested, or if you have any of the symptoms described above, particularly a flu-like illness after a risk event. Testing is confidential and, in many places, freely available. If you think you may have been exposed within the last 72 hours, medical advice should be sought urgently because PEP works only when started quickly.

If you already have HIV, seek medical attention promptly if you notice any of the following red-flag warning signs:

• High fever that does not settle, or fever with shaking chills
• Shortness of breath, chest pain, or a persistent cough
• Severe headache, stiff neck, confusion, or seizures
• Sudden changes in vision
• Difficulty swallowing or painful mouth sores that prevent eating
• Diarrhea lasting more than a few days, or signs of dehydration
• Rapid unexplained weight loss
• New skin lesions, especially purple or dark patches
• Severe rash, yellowing of the skin or eyes, or other possible medication reactions
• Any new symptom that worries you, particularly if you have recently started or changed treatment

These symptoms may indicate an opportunistic infection, a medication side effect, or another condition that needs assessment. Prompt evaluation allows problems to be identified and managed early.