Children need vaccines early because they are susceptible to disease at a young age. Infectious diseases can be life-threatening for infants and young children.

Your bone marrow makes blood cells, including red blood cells. Chemotherapy can damage your bone marrow. When this happens, your body makes fewer red blood cells or destroys them before their normal life span is over.

Your doctor says your chest pain (angina) is caused by blockages in your heart arteries and that you need to get those blockages taken care of. What are your options?

Some home cholesterol test kits are as accurate as the test your doctor uses, but it often depends on how precisely you follow the directions. Accuracy also varies from brand to brand. The most accurate test kits may be ones that are affiliated with a tracking program offered through the Centers for Disease Control and Prevention.

Micturition (or post-micturition) syncope is fainting during or, more commonly, immediately after urination due to a severe drop in blood pressure. Micturition syncope is most common in older men and usually occurs at night after a deep sleep.