Early HIV symptoms usually occur within a couple of weeks to a month or two after infection and are often like a bad case of the flu. In many people, early HIV signs and symptoms include:

Certain types of osteoporosis drugs have been associated with an increased risk of two rare but serious problems - osteonecrosis of the jaw and an unusual type of fracture in the upper thigh bone (femur).

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.

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.

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.