In-depth

Causes

Anthrax

Anthrax is a deadly bacterial illness that normally affects animals. But in rare instances, humans can contract the disease.

Lyme disease

Lyme disease is a tick-borne illness. Left untreated, it can lead to serious and lingering complications — including arthritis.

Prevention

Childhood vaccines

Childhood vaccines offer protection from serious and potentially fatal diseases. Use this guide to keep your child's shots on track.

Vaccines for adults

Symptoms

Headache

Most headaches aren't caused by a serious illness, but some could be a sign of a life-threatening condition.

Nausea and vomiting

Sick to your stomach? Nausea and vomiting usually pass quickly but sometimes result from long-term or serious conditions.

Tests and diagnosis

CT scan

A CT scan is an imaging test that uses X-rays to produce detailed images of the inside of your body.

Lumbar puncture (spinal tap)

Lumbar puncture (spinal tap) — Overview covers definition, risks and results of this procedure.

X-ray

X-rays are a form of radiation that can make images of your bones and internal organs.

Mar. 19, 2013