Allergies are more common than ever, affecting up to 1 in 3 people. From basic concepts to in-depth discussion of specific allergic diseases, a board-certified allergist makes allergies simple to understand in this complete resouce. Get information on asthma, eczema, hay fever, food allergy and more from Daniel More, M.D., an expert in the diagnosis and treatment of allergic diseases.

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Lab Tests Online offers noncommercial patient education on blood, urine, and other lab tests to help health care consumers better manage their care.

The National Library of Medicine (NLM), on the campus of NIH in Bethesda, Maryland, is the world's largest medical library. It collects materials in all major areas of the health sciences and to a lesser degree in such areas as chemistry, physics, botany and zoology. The collections stand at 5 million items--books, journals, technical reports, manuscripts, microfilms, photographs and images. Housed within the Library is one of the world's finest medical history collections of old (pre-1914) and rare medical texts, manuscripts, and incunabula.

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