Google Scholar provides a way to broadly search for scholarly literature. It searches a variety of resources, including PubMed, electronic journals, and Google Book Search. individually.
MMWR is the U.S. Center for Disease Control publication of timely, reliable, authoritative, accurate, objective, and useful public health information and recommendations.
BioMed Central is an open access publisher of over 200 free online academic journals specializing in subjects related to science, technology and medicine.
Health resource, training, and promotion materials for community health workers. Hesperian's HealthWiki content is freely available but other site content may require a fee.