HIV: Symptoms, Causes, Transmission, Testing, Treatment and What a Positive Result Means

HIV is a medical condition that is often surrounded by fear, myths and misinformation. Some people worry that HIV can spread through hugging, sharing food or using the same bathroom. Others assume that an HIV-positive diagnosis automatically means AIDS or a shortened life.

The reality is very different today.

HIV (human immunodeficiency virus) attacks the immune system, particularly CD4 cells that help the body fight infections. If HIV is left untreated, it can gradually weaken the immune system and may eventually lead to AIDS (acquired immunodeficiency syndrome), the most advanced stage of HIV infection. However, modern antiretroviral treatment (ART) can suppress HIV, protect the immune system and allow people living with HIV to lead long and healthy lives.

This guide explains how HIV starts, how it spreads, its early symptoms, how HIV is diagnosed, what happens after a positive result and how treatment has changed the outlook for people living with HIV.

What is HIV?

HIV is a virus that attacks cells of the immune system, especially CD4 T lymphocytes. As HIV reproduces, it can gradually reduce the body’s ability to fight infections and certain cancers.

HIV and AIDS are not the same thing.

HIV is the virus and the infection it causes. AIDS is the most advanced stage of untreated HIV infection. With effective treatment, many people with HIV never develop AIDS.

According to WHO, an estimated 41 million people were living with HIV worldwide at the end of 2025, demonstrating that HIV remains an important global health issue. At the same time, effective treatment has transformed HIV from a frequently fatal illness into a manageable chronic condition for people who can access and adhere to appropriate care.

How does HIV start?

HIV starts when the virus enters the body and establishes an infection. It can enter through certain mucous membranes, open cuts or sores, or directly into the bloodstream.

The most common routes of transmission include:

• Vaginal or anal sex with a person who has a detectable viral load
• Sharing needles, syringes or other injection equipment
• Exposure to infected blood
• Transmission from mother to baby during pregnancy, childbirth or breastfeeding
• In rare circumstances, exposure to contaminated blood through unsafe medical or cosmetic procedures

HIV is found in certain body fluids, including blood, semen (including pre-seminal fluid), vaginal fluids, rectal fluids and breast milk. For transmission to occur, infected fluid generally needs a route into the bloodstream or through susceptible mucous membranes or damaged tissue.

What are the causes of HIV?

The cause of HIV infection is exposure to HIV from an infected person through specific routes of transmission.

Having sex without a condom does not automatically mean someone will acquire HIV. The risk depends on several factors, including whether the partner has HIV, whether the partner has a detectable viral load, the type of sexual exposure and the presence of other factors such as blood or sexually transmitted infections.

A person living with HIV who takes ART consistently and maintains an undetectable viral load does not transmit HIV through sex. This is known as U=U — Undetectable = Untransmittable.

What happens if HIV is positive?

A positive HIV test does not mean that a person has AIDS or that they are going to die.

First, an initial positive or reactive screening result needs appropriate follow-up testing to confirm the diagnosis. Once HIV infection is confirmed, a healthcare professional will assess the person’s overall health and usually perform tests such as viral load and CD4 testing.

Treatment with antiretroviral therapy should then be started as soon as medically appropriate.

ART works by stopping HIV from multiplying effectively. Over time, treatment can reduce the amount of HIV in the blood to an undetectable viral load. This helps protect the immune system and prevents sexual transmission when the undetectable level is maintained.

So, an HIV-positive result should be viewed as the beginning of appropriate medical care — not the end of the road.

What are the first signs of HIV?

The first signs of HIV can be difficult to recognise because they often resemble common viral illnesses.

When symptoms occur, they commonly appear around 2 to 4 weeks after infection and may include:

• Fever
• Chills
• Sore throat
• Skin rash
• Night sweats
• Muscle aches
• Fatigue
• Swollen lymph nodes
• Headache
• Mouth ulcers

Some people have no symptoms at all. Others may experience symptoms that are mild enough to be mistaken for influenza, COVID-19 or another viral infection.

This is why symptoms alone cannot diagnose HIV.

What are 7 signs of HIV?

Seven commonly reported symptoms during acute HIV infection are:

1. Fever
2. Sore throat
3. Skin rash
4. Swollen lymph nodes
5. Night sweats
6. Muscle aches
7. Unusual tiredness or fatigue

These symptoms are not specific to HIV. A person can have one, several, or none of them. The only reliable way to determine HIV status is appropriate testing.

What does stage 1 HIV look like?

Stage 1 is generally called acute HIV infection.

Some people experience a flu-like illness during this stage, while others have no noticeable symptoms. The virus is multiplying rapidly during acute infection, and the amount of virus in the blood can be particularly high.

There is therefore no single appearance that tells you someone has stage 1 HIV.

A person with acute HIV may look completely healthy.

That is one of the reasons relying on someone’s appearance, symptoms or physical condition to judge whether they have HIV is unreliable and can contribute to stigma.

Where does HIV pain start?

There is no specific place where HIV pain starts.

Early HIV infection can cause general muscle aches, headaches, sore throat or swollen lymph nodes. These symptoms are not unique to HIV.

Later symptoms, when they occur, depend on how the infection has affected the immune system and whether other infections or illnesses have developed.

If you have a particular pain after a possible HIV exposure, the location or nature of the pain cannot tell you whether you have HIV. Testing is far more useful than trying to interpret symptoms.

What happens after the early stage of HIV?

Without treatment, HIV generally progresses through three broad stages:

1. Acute HIV infection

This is the earliest stage. The virus multiplies rapidly, and some people develop flu-like symptoms.

2. Chronic HIV infection

The virus remains in the body but may produce few or no symptoms. A person can feel completely well while still having HIV and, if their viral load is detectable, potentially transmitting it.

Without treatment, this stage can last for years.

3. AIDS

AIDS is the advanced stage of HIV infection in which the immune system has been severely damaged.

People with AIDS are more vulnerable to serious opportunistic infections and certain cancers. Symptoms can include significant weight loss, prolonged fever, night sweats, persistent diarrhoea, severe fatigue, recurrent infections and other serious illnesses.

The important point is that effective HIV treatment can prevent many people from ever progressing to AIDS.

Is HIV still a death sentence?

No. HIV is not considered an automatic death sentence today.

This is one of the biggest changes in HIV care.

There is currently no cure for HIV, but ART can suppress the virus and allow the immune system to recover or remain strong. WHO describes HIV as a manageable chronic health condition when effective treatment and care are available.

People who start treatment early, take their medicines consistently and remain under appropriate medical care can live long, healthy lives.

How long can someone live with HIV?

There is no single number of years that applies to everyone.

Life expectancy depends on factors such as:

• How early HIV is diagnosed
• How quickly treatment is started
• Adherence to ART
• Viral load control
• CD4 count and immune-system health
• Other infections or medical conditions
• Access to regular medical care
• Smoking, alcohol, nutrition and other lifestyle factors

For someone receiving effective treatment and maintaining viral suppression, HIV can be managed as a long-term condition, and many people can expect to live for decades.

The earlier HIV is diagnosed and treated, the better the opportunity to protect the immune system.

Can HIV be cured?

There is currently no widely available cure for HIV.

ART does not remove every HIV particle from the body. Instead, antiretroviral medicines prevent the virus from reproducing effectively and reduce the viral load to very low or undetectable levels.

This is different from saying that HIV is cured.

For most people, HIV treatment is long-term and requires ongoing medical supervision.

What kills the HIV virus?

There is no household substance, food, supplement or home remedy that can safely eliminate HIV from the body.

The medically proven approach is antiretroviral therapy.

ART works by blocking different stages of HIV’s replication cycle. It does not simply “kill HIV” in the way an antiseptic might kill bacteria on a surface. Instead, it suppresses HIV so effectively that the amount of virus in the blood can become undetectable.

This distinction matters because stopping treatment can allow HIV to multiply again.

How do HIV drugs look?

There is no single appearance for HIV medicines.

HIV treatment includes different medicines and combinations, and they may be supplied as:

• Tablets
• Capsules
• Combination tablets containing more than one medicine
• Long-acting injectable medicines in appropriate circumstances

The colour, shape, size and markings of HIV tablets vary according to the medicine and manufacturer. Therefore, you should never try to identify an HIV medicine simply by looking at a pill.

A person’s HIV medication is also private medical information. There is no reliable way to determine whether someone has HIV by looking at their medicines.

Current HIV treatment recommendations continue to evolve, including newer and long-acting treatment options. WHO’s updated 2026 clinical guidance includes developments in antiretroviral treatment and long-acting medicines.

Is HIV in blood or sperm?

Yes. HIV can be present in both blood and semen.

HIV can also be present in pre-seminal fluid, vaginal fluids, rectal fluids and breast milk.

However, the presence of HIV in a body fluid does not mean transmission will automatically occur. The fluid needs an appropriate route into another person’s body, and the risk is strongly influenced by the infected person’s viral load and the nature of the exposure.

Can HIV be transmitted through kissing?

Ordinary kissing does not transmit HIV.

HIV is not spread through saliva, and there is no risk from closed-mouth or social kissing.

Extremely rare cases involving deep open-mouth kissing have been reported where both people had bleeding gums or open sores and blood was involved. Even then, this is an exceptionally uncommon route compared with sexual or blood exposure.

So, you do not need to avoid hugging, ordinary kissing or normal social contact with someone living with HIV.

Can you share a bathroom with someone who has HIV?

Yes. You can safely share a bathroom with someone who has HIV.

HIV is not spread through:

• Toilet seats
• Bathroom floors
• Urine
• Sweat
• Water
• Sharing a shower
• Sharing towels under ordinary circumstances
• Hugging or shaking hands
• Sharing dishes or drinking glasses

HIV cannot survive and spread through casual household contact in these ways.

There is no reason to isolate someone from their family because they have HIV.

How is HIV diagnosed?

HIV is diagnosed through specific HIV tests, rather than by symptoms.

Depending on the situation, testing may look for:

• HIV antibodies
• HIV antigen and antibodies
• HIV genetic material through a nucleic acid test (NAT)

Laboratory antigen/antibody testing using blood from a vein can generally detect HIV about 18 to 45 days after exposure, while NAT can detect infection earlier, typically around 10 to 33 days after exposure. Antibody-only tests can take longer.

This period is called the window period.

Therefore, the timing of a test matters. A negative result obtained too soon after exposure may not reliably exclude a recent infection.

In India, HIV diagnosis follows a structured testing strategy, with reactive results requiring appropriate confirmatory testing rather than relying on a single screening result.

If you believe you have recently been exposed to HIV, speak to a healthcare professional promptly. PEP (post-exposure prophylaxis) can help prevent infection after certain exposures and needs to be started as soon as possible, generally within 72 hours.

Is HIV preventable?

Yes. Several strategies can substantially reduce the risk of HIV.

These include:

• Using condoms correctly and consistently
• Avoiding the sharing of needles or syringes
• Using sterile equipment for injections, tattoos and piercings
• HIV testing
• PrEP for people who may have ongoing risk
• PEP after a potential exposure
• HIV treatment for people living with HIV
• Appropriate medical care during pregnancy

One of the most important developments in HIV prevention is U=U. When a person living with HIV takes treatment as prescribed and maintains an undetectable viral load, there is zero risk of sexual transmission of HIV.

What age is HIV most common?

HIV is not restricted to a particular age group.

Children, teenagers, adults and older adults can all acquire HIV if they experience an exposure that can transmit the virus.

Globally, most people living with HIV are adults aged 15 years and older. Young people aged 15–24 also account for a substantial number of new infections, with risk patterns varying considerably by region and population.

The important factor is therefore exposure and risk, not simply age.

HIV is not spread by casual contact

The infographic accompanying this article highlights an important distinction: HIV is not spread through ordinary daily interaction.

You cannot get HIV from:

• Hugging
• Shaking hands
• Sharing a bathroom
• Sharing food or drinks
• Sharing dishes
• Sweat
• Coughing or sneezing
• Mosquitoes or other insects
• Sharing ordinary personal items
• Sitting beside someone
• Closed-mouth kissing

HIV requires specific types of exposure to certain body fluids.

This knowledge is important not only for prevention, but also for reducing the stigma faced by people living with HIV.

Frequently Asked Questions About HIV

1. What is the difference between HIV and AIDS?

HIV is the virus and infection. AIDS is the most advanced stage of HIV infection, when the immune system has become severely damaged. Effective treatment can prevent many people with HIV from developing AIDS.

2. Can a person with HIV have no symptoms?

Yes. Some people have no symptoms during acute infection, and chronic HIV can also remain symptom-free for years. This is why testing is more reliable than symptoms for determining HIV status.

3. Can HIV be transmitted through saliva?

No. HIV is not transmitted through saliva during ordinary social contact or kissing.

4. Can HIV spread through food?

HIV is not normally transmitted through food or drinks handled by someone living with HIV. Extremely rare documented situations involving pre-chewed food have involved blood from a caregiver’s mouth entering the food, primarily in infants.

5. Can HIV be transmitted by mosquitoes?

No. HIV is not transmitted by mosquitoes, ticks or other insects.

6. What should I do after possible HIV exposure?

Seek medical advice immediately. PEP may be appropriate after certain exposures and is most effective when started as soon as possible, within 72 hours.

7. Does a positive HIV test mean AIDS?

No. A person can have HIV without having AIDS. AIDS represents advanced HIV infection with severe immune-system damage or certain opportunistic illnesses.

8. Can someone with HIV have children?

Yes. With appropriate medical care and treatment, the risk of passing HIV from parent to child can be dramatically reduced. Pregnancy planning should be discussed with an HIV specialist or appropriate healthcare professional.

9. Can HIV treatment make the virus undetectable?

Yes. ART can reduce the amount of HIV in the blood to an undetectable level. Maintaining an undetectable viral load is important for both the health of the person living with HIV and sexual transmission prevention.

10. Is there a cure for HIV yet?

There is no generally available cure for HIV at present. However, treatment is highly effective at suppressing the virus and helping people live long, healthy lives.

When should you consider an HIV test?

Consider HIV testing if you have had a potential exposure, such as:

• Sex without a condom with a partner whose HIV status or viral suppression is unknown
• Sharing needles or injection equipment
• Exposure to potentially infected blood
• A sexual partner who has HIV and is not known to be virally suppressed
• A healthcare professional recommends testing because of symptoms or another medical reason
• A pregnancy, where HIV testing forms an important part of antenatal care

Remember that you cannot diagnose HIV from symptoms alone.

If you are concerned about a recent exposure, don’t wait for symptoms to appear. Speak with a healthcare professional about the appropriate test and its timing.

Final thoughts

An HIV diagnosis can understandably feel frightening, but HIV today is very different from what it was several decades ago.

The most important steps are early testing, accurate diagnosis, prompt treatment and consistent follow-up. Modern ART can suppress HIV, protect the immune system and allow people living with HIV to lead long and healthy lives. People who maintain an undetectable viral load also do not transmit HIV through sex.

Just as importantly, HIV cannot be spread through everyday contact. Sharing a home, bathroom, meal or hug with someone living with HIV does not put you at risk.

If you are worried about a possible exposure, the best response is not to guess from symptoms or appearance — get the appropriate HIV test and speak with a qualified healthcare professional.

For diagnostic testing information in Kolkata, you can visit Sparsh Diagnostic Centre.

Medical note: This article is intended for general health education and should not replace an evaluation by a qualified healthcare professional. Testing and treatment decisions should be based on the individual’s exposure history, test timing and clinical circumstances.

To get tested for HIV from the comforts of your own homes, call Sparsh Diagnostic Center’s helpline number 9830117733.

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Disclaimer:

No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.