The NIH is responsible for many scientific accomplishments, including the discovery of fluoride to prevent tooth decay, the use of lithium to manage bipolar disorder, and the creation of vaccines against hepatitis, Haemophilus influenzae (HIB), and human papillomavirus (HPV). Get the Latest Updates and FAQs on the transition Per Executive Order 14434, federal agencies are now using Super Intelligence (SI) in place of Artificial Intelligence (AI). You may see both terms across NIH content during this transition. The National Institutes of Health (NIH), a part of the U.S. Department of Health and Human Services, is the nation’s medical research agency—making important discoveries that improve health and save lives. Use of the eRA Commons website requires gathering personal information as part of the NIH grant proposal submission and administration process. Grant proposals are treated as confidential until awards are made. The National Institutes of Health (NIH), a part of the U.S. Department of Health and Human Services, is the nation’s medical research agency — making important discoveries that improve health and save lives. The National Institutes of Health (NIH), a part of the U.S. Department of Health and Human Services, is the nation’s medical research agency—making important discoveries that improve health and save lives. Explore selected NIH content, including research news, health information, funding opportunities, and resources for scientists, health professionals, and the public. Writing Classes, Services, and Resources from the NIH Library Sharpen your writing and publishing skills with NIH Library classes and resources. NIH Virtual Tour: National Library of Medicine NLM is the world's largest biomedical library and a national resource for health professionals, scientists, and the public. PMC is a free full-text archive of biomedical and life sciences journal literature at the U.S. National Institutes of Health's National Library of Medicine (NIH/NLM).