Conceptual illustration of various forms of anemia. Several types of anemic red blood cell shapes accompany normal red blood cells in the foreground. The colored caps on the vials denote blood tests used to diagnose specific anemia types. The background includes a standard microscope.

Conceptual illustration of diabetes drugs used to treat problems in the liver, pancreas, and digestive system. A normal pancreas is shown above a drawing of the digestive system. A pill bottle releases representative drugs to treat diabetes-related problems in the liver and digestive system as well as insulin production in the pancreas.

Conceptual illustration of pediatric meningitis diagnosis. A child's brain, side view, shows characteristic surface inflammation. The silhouette provides a background for bacteria floating below. A lumbar cerebrospinal fluid (CSF) tap shows a needle inserted into the spinal canal. Arrows indicate fluid withdrawal used for diagnostic testing.

Close-up of a generic cochlear implant electrode inserted into the coils of the cochlea, sectioned to show the electrode and the cochlear nerve distribution. Also shown are the eardrum, malleus, incus, and stapes, which conduct sound across the middle ear (lower left). The bony labyrinth cavity structures of the inner ear are represented as solid.

Conceptual illustration of target antibody treatment for cancer. Highlighted terminals on the antibodies convey a connection to the target.

Illustration showing an artist's concept of nanocameras in a blood vessel.

Illustration of the concept of weighing medical costs: a balance with a pill bottle and dollar sign.

Photo illustration showing the concept of rising of medical costs.

Photo illustration showing the concept of the high cost of medicine.

Illustration showing an artist's concept of nanoshells, an experimental cancer treatment. The treatment consists of gold nanoshells injected into cancer cells that are then irradiated with near-infrared radiation to destroy the cancer cells.

Illustration of the movement range of the human body covered by a vitamin E pill.

Close-up of a man's eye with letters and units from a vision chart superimposed over it.

Torso with gear wheels inside.

Torso with gear wheels inside.

Torso with replacement parts.

Conceptual image illustrating the isolation experienced by a person with Alzheimer's.

Confusion and isolation experienced by a person with Alzheimer's.

Heart with an EKG across it, under a blue sky.

Doctors maintaining the health of a heart with medication, under a blue sky.

Doctors on scaffolding repairing foot bones and ligaments.