Overview

Acquired immunodeficiency syndrome (AIDS), is an ongoing, also called chronic, condition. It’s caused by the human immunodeficiency virus, also called HIV. HIV damages the immune system so that the body is less able to fight infection and disease. If HIV isn’t treated, it can take years before it weakens the immune system enough to become AIDS. Thanks to treatment, most people in the U.S. don’t get AIDS.

HIV is spread through contact with genitals, such as during sex without a condom. This type of infection is called a sexually transmitted infection, also called an STI. HIV also is spread through contact with blood, such as when people share needles or syringes. It is also possible for a person with untreated HIV to spread the virus to a child during pregnancy, childbirth or breastfeeding.

There’s no cure for HIV/AIDS. But medicines can control the infection and keep the disease from getting worse. Antiviral treatments for HIV have reduced AIDS deaths around the world. There’s an ongoing effort to make ways to prevent and treat HIV/AIDS more available in resource-poor countries.

Symptoms

The symptoms of HIV and AIDS vary depending on the person and the phase of infection.

Primary infection, also called acute HIV

Some people infected by HIV get a flu-like illness within 2 to 4 weeks after the virus enters the body. This stage may last a few days to several weeks. Some people have no symptoms during this stage.

Possible symptoms include:

• Fever.
• Headache.
• Muscle aches and joint pain.
• Rash.
• Sore throat and painful mouth sores.
• Swollen lymph glands, also called nodes, mainly on the neck.
• Diarrhea.
• Weight loss.
• Cough.
• Night sweats.

These symptoms can be so mild that you might not notice them. However, the amount of virus in your bloodstream, called viral load, is high at this time. As a result, the infection spreads to others more easily during primary infection than during the next stage.

Clinical latent infection, also called chronic HIV

In this stage of infection, HIV is still in the body and cells of the immune system, called white blood cells. But during this time, many people don’t have symptoms or the infections that HIV can cause.

This stage can last for many years for people who aren’t getting antiretroviral therapy, also called ART. Some people get more-severe disease much sooner.

Symptomatic HIV infection

As the virus continues to multiply and destroy immune cells, you may get mild infections or long-term symptoms such as:

• Fever.
• Fatigue.
• Swollen lymph glands, which are often one of the first symptoms of HIV infection.
• Diarrhea.
• Weight loss.
• Oral yeast infection, also called thrush.
• Shingles, also called herpes zoster.
• Pneumonia.

Progression to AIDS

Better antiviral treatments have greatly decreased deaths from AIDS worldwide. Thanks to these lifesaving treatments, most people with HIV in the U.S. today don’t get AIDS. Untreated, HIV most often turns into AIDS in about 8 to 10 years.

Having AIDS means your immune system is very damaged. People with AIDS are more likely to develop diseases they wouldn’t get if they had healthy immune systems. These are called opportunistic infections or opportunistic cancers. Some people get opportunistic infections during the acute stage of the disease.

The symptoms of some of these infections may include:

• Sweats.
• Chills.
• Fever that keeps coming back.
• Ongoing diarrhea.
• Swollen lymph glands.
• Constant white spots or lesions on the tongue or in the mouth.
• Constant fatigue.
• Weakness.
• Rapid weight loss.
• Skin rashes or bumps.

When to see a doctor

If you think you may have been infected with HIV or are at risk of contracting the virus, see a healthcare professional as soon as you can.

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