A bill to amend the Public Health Service Act and the Social Security Act to provide improved and expanded access to comprehensive primary health care and related services for medically underserved and vulnerable populations through the provision of financial support for the development of community-based health networks and plans, to permit federally-assisted health centers to expand their capacity and develop and operate new sites to serve underserved and vulnerable populations, to proivde certain financial and other protections for such networks, plans, and health centers, and to facilitate the involvement of, and payment to, entities serving underserved and vulnerable populations in the training and education of primary care health professionals, and for other purposes