Vivisimo, a provider of enterprise search software, has announced its selection by the National Library of Medicine (NLM) to enhance searching on www.nlm.nih.gov. The NLM, a biomedical library, will leverage Vivisimo's enhanced search functionality to provide access to information on linked web pages. Vivisimo will also enable search functionality for the NLM's consumer health websites, MedlinePlus (http://medlineplus.gov) and MedlinePlus en español (http://medlineplus.gov/spanish), aggregators of medical and health information from government agencies and other authoritative organizations. Visitors of the sites will be able to search for health topics such as 'arthritis' or 'back pain,' and access the data from the respective site's pages. Furthermore, users can hone in on specific questions like "what causes Chickenpox?" or "what are the symptoms of Lupus?" and receive answers.