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| | Blood Transfusions |
 | | Hospitals need blood for people who are injured, as well as for patients having heart surgery, organ transplants, cancer treatments, and treatments for other diseases that affect the blood, like sickle cell anemia. |
 | | The blood cells are made in the bone marrow, a spongy substance contained within many of the bones in the body. |
 | | In addition, all blood donations are tested for several viruses, including HIV (the virus that causes AIDS), hepatitis B, hepatitis C, syphilis, and West Nile virus. |
| kidshealth.org /teen/your_body/medical_care/transfusions.html (1477 words) |
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