About.com: AIDS is a comprehensive site that provides important information for those living with HIV and AIDS, those affected by HIV AIDS, and those who care for people living with HIV AIDS. About.com: AIDS also contains extensive information about hepatitis b and hepatitis c.

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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The leading source for trustworthy and timely health and medical news and information. Providing credible health information, supportive community, and educational services by blending award-winning expertise in content, community services, expert commentary, and medical review.

Find the Web's best health guides, medical reports, health news, and videos for any health topic.

AIDS.ORG provides information about the prevention, testing, treatment and research of the HIV virus, raising HIV and AIDS awareness while building a support community.