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  • Spinal Tap

    A spinal tap (also called a lumbar puncture) is a medical test that involves taking a small sample of cerebrospinal fluid for examination. Find out what's involved in this article for teens.

  • Blood Transfusions

    About 5 million people a year get blood transfusions in the United States. This article explains why people need them and who donates the blood used.

  • How Do People Get AIDS?

    AIDS, or acquired immunodeficiency syndrome, is a disease where the body is unable to fight off many infectious diseases as it normally could. Find out how AIDS is spread and how to protect yourself against it.

  • HIV Testing Resources

    Often the only way to know if someone is infected with HIV is through testing. Here are the facts on what's involved in getting tested — and who should get tested for HIV and why.

  • Chemotherapy

    Chemotherapy, or chemo, is the use of medications to treat cancer. This article explains how chemo works and what to expect when getting treatment.

  • Tattoos

    What's the safest way to get a tattoo? Does it hurt? What can go wrong? Knowing the facts will help you decide whether a tattoo is a good idea for you.

  • Hemodialysis

    Hemodialysis is the type of kidney dialysis that doctors use most to take over the kidneys' job of filtering the blood.

  • How to Give an Insulin Injection

    Note: This step-by-step graphic is for educational purposes only. For specific guidance on giving an insulin injection, talk with your doctor.

  • 5 Tips for Surviving Shots

    If you're afraid of shots, you're not alone. Next time your doc asks you to roll up your sleeve, try these tips.

  • Osteomyelitis

    Sometimes a bad cut that gets infected can lead to even worse things, like a bone infection called osteomyelitis. The easiest way to protect yourself is to practice good hygiene.