Health Library

The Health Library is a collection of health and wellness resources created for learning and accessibility. Select a topic below for related health information or search for a topic in the search bar for more information on other medical conditions.

HIV/AIDS

  • Discusses HIV, a virus that attacks white blood cells called CD4+ cells which are an important part of the immune system. Covers symptoms and stages of infection, including last stage called AIDS (acquired immunodeficiency syndrome). Covers HIV treatment.

  • HIV (human immunodeficiency virus) is a virus that attacks the immune system, the body's natural defense system. Without a strong immune system, the body has trouble fighting off disease. Both the virus and the infection it causes are called HIV....

  • The U.S. Centers for Disease Control and Prevention (CDC) classifies untreated HIV infection into three stages: CDC stages of HIV infection Acute retroviral syndrome: This is an illness with symptoms like mononucleosis. It often develops within a few days of infection with HIV, but it also may...

  • HIV does not survive well outside the body. HIV cannot be spread from one person to another in any of the following ways: Casual contact In studies of hundreds of households in which families have lived with and cared for people who have AIDS, including situations in which no one knew that the person...

  • Providing support for a person who has AIDS can be a stressful and emotional experience. You may feel frustrated if the person doesn't want to take all of the medicine prescribed or if he or she doesn't get better despite your efforts. To help...

  • If a person's HIV infection progresses, you may be called on to provide home care for that person. A home care course may give you the knowledge, skills, and confidence to provide the care needed. Contact your local Red Cross chapter, Visiting Nurse...

  • Pneumocystis is a fungus that can sometimes cause pneumonia in people who have AIDS. Pneumonia is an infection of the lungs. Pneumonia can make it hard to breathe and to get enough oxygen into the bloodstream. Symptoms often begin suddenly and may be similar to those of an upper respiratory infection, such as...

  • Opportunistic infections and diseases occur in people whose immune systems have been weakened. They usually do not occur in people who have healthy immune systems. When the immune system is weakened by a disease such as HIV infection, opportunistic diseases may cause serious, even life-threatening, illnesses...

  • Discusses HIV, a virus that attacks white blood cells called CD4+ cells which are an important part of the immune system. Covers symptoms and stages of infection, including last stage called AIDS (acquired immunodeficiency syndrome). Covers HIV treatment.

  • Learn what is checked during an HIV test, who might need one, and what the results may mean.

  • Guides through the decision to be screened for an HIV infection. Explains HIV and discusses causes and lifestyles that put you at higher risk for getting infected. Covers benefits and risks. Includes an interactive tool to help you make your decision.

  • Viral load is a measurement of how much HIV is present in your blood. A sample of blood is drawn and sent to a lab for testing. Results are expressed as the number of copies of the virus per milliliter of blood. Each virus is called a "copy" because...

  • The U.S. Centers for Disease Control and Prevention (CDC) classifies untreated HIV infection into three stages: CDC stages of HIV infection Acute retroviral syndrome: This is an illness with symptoms like mononucleosis. It often develops within a few days of infection with HIV, but it also may...

  • CD4+ cells are part of the immune system and are a type of white blood cell. White blood cells protect the body against infection. CD4+ cells are also called T-lymphocytes, T-cells, or T-helper cells. HIV invades and destroys CD4+ cells. But the...

  • Health professionals are not considered at high risk for HIV infection, because they use protection (such as gloves, masks, and goggles) when dealing with blood or body fluids. The chances of becoming infected after being stuck or cut with an instrument that is contaminated with HIV-infected blood are about 1...

  • HIV does not survive well outside the body. HIV cannot be spread from one person to another in any of the following ways: Casual contact In studies of hundreds of households in which families have lived with and cared for people who have AIDS, including situations in which no one knew that the person...

  • Eating a nutritious, balanced diet is an important part of treating HIV. Good nutrition can help your immune system stay strong, which in turn may help your body fight HIV. Knowing the best way to nourish your body will help keep it strong and allow...

  • Exercise can't control the HIV infection. But exercise may help you feel better by reducing stress. Exercise may also help your immune system work better. Exercise: Is safe. Improves strength and endurance. Improves heart and lung fitness. May help...

  • It is important to think about the emotional well-being of the person with HIV you care for. Because every person's emotional needs are different, no single approach is best for everybody. Encourage the person to become involved in medical decisions...

  • HIV is present in the blood, semen, and vaginal fluids of a person who is infected with HIV and is usually spread by: Unprotected sex (vaginal, anal, or oral) with a person who is infected with HIV. Using condoms is the only way to prevent getting...

  • A person who has HIV has difficulty fighting off other infections. You can help protect the person from infections. Avoid close contact with people who have contagious illnesses until their symptoms have disappeared. This includes illnesses such as...

  • Providing support for a person who has AIDS can be a stressful and emotional experience. You may feel frustrated if the person doesn't want to take all of the medicine prescribed or if he or she doesn't get better despite your efforts. To help...

  • If a person's HIV infection progresses, you may be called on to provide home care for that person. A home care course may give you the knowledge, skills, and confidence to provide the care needed. Contact your local Red Cross chapter, Visiting Nurse...

  • A human immunodeficiency virus (HIV) test detects HIV antibodies or antigens, or the genetic material ( DNA or RNA) of HIV in the blood or another type of sample. This can show if an HIV infection is present (HIV-positive). HIV infects white blood cells called CD4+ cells. They are part of the body's immune system that...

  • What are the most important things you need to know about your medicines? Make sure you know about each of the medicines you take. This includes why you take it, how to take it, what you can expect while you're taking it, and any warnings about the medicine. The information provided here is general. So be sure...

  • Many people worry about getting a disease like hepatitis or HIV from an accidental needle stick. But it doesn't happen often. Most of the time, the person on whom the needle was used doesn't have hepatitis, HIV, or another infection that can be spread that way. When the person does have an infection that can be spread...

  • The human immunodeficiency virus (HIV) changes (mutates) often. Sometimes these changes make the virus resistant to a particular medicine or class of medicines, which means the medicine is no longer effective against the virus. When this happens, the medicine no longer controls virus growth (replication) or protects the...

  • Medicines and vaccines are used to prevent infections and certain diseases ( opportunistic infections) that are more common in people with HIV. Primary prevention means preventing illness before it occurs. Immunizations (vaccines) are one kind of primary prevention. Medicines that kill or control the...

  • Pneumocystis is a fungus that can sometimes cause pneumonia in people who have AIDS. Pneumonia is an infection of the lungs. Pneumonia can make it hard to breathe and to get enough oxygen into the bloodstream. Symptoms often begin suddenly and may be similar to those of an upper respiratory infection, such as...

  • Antiretroviral therapy (ART) is the combination of several antiretroviral medicines used to slow the rate at which HIV makes copies of itself (multiplies) in the body. A combination of three or more antiretroviral medicines is more effective than using just one medicine (monotherapy) to treat HIV. The use of three or...

  • Opportunistic infections and diseases occur in people whose immune systems have been weakened. They usually do not occur in people who have healthy immune systems. When the immune system is weakened by a disease such as HIV infection, opportunistic diseases may cause serious, even life-threatening, illnesses...

  • Taking antiretroviral drugs for HIV will not cure your infection. But it may allow you to stay healthy for a long time. And treatment can help prevent spreading the infection to other people. Your willingness and ability to follow your antiretroviral therapy schedule exactly as prescribed is essential for successful...

  • The United States Preventive Services Task Force, U.S. Centers for Disease Control and Prevention, American Academy of Pediatrics, and American College of Obstetricians and Gynecologists recommend that all pregnant women be screened for human immunodeficiency virus (HIV) infection. This is because early detection and...

  • A viral load test measures how much human immunodeficiency virus (HIV) is in the blood. Viral load is first measured when you are diagnosed with HIV infection. This first measurement serves as the baseline. Future viral load measurements will be compared with the baseline. Since viral load can vary from day to day, the...

  • A few people with HIV are described as nonprogressors. These people have HIV that does not progress to more severe symptoms or disease, but they can still spread HIV. Most nonprogressors: Have lived with the infection for 10 to 15 years and remained healthy. Do not have declining CD4+ cell counts...

  • Weight loss in people with HIV has many possible causes. If you lose weight fast, it may be because you have another infection along with HIV. This type of illness is called an opportunistic infection. Gradual weight loss may be due to problems with nutrition. You may lose weight if you can't eat enough food or if your...

  • Feeling tired is common if you have HIV, especially if you have had the virus for many years. Being severely tired can affect your ability to work, take care of yourself, and enjoy your life. There can be many reasons why you are tired. It is important that you and your doctor try to find the cause. Many of the things...

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