http://health.gov/communication/literacy/issuebrief/ study basic or below basic health literacy 77 million people http://www.health.gov/communication/literacy/issuebrief/ study survey of health literacy Only about 12 percent U.S. Department of Health & Human Services http://www.health.gov/communication/literacy/issuebrief/ www.health.gov/communication/literacy/issuebrief/ study U.S. Department of Health & Human Services America's Health Literacy U.S. Department of Health & Human Services U.S. Department of Health & Human Services survey of health literacy U.S. Department of Health & Human Services http://www.health.gov/communication/literacy/issuebrief/ U.S. Department of Health & Human Services study 77 million people www.health.gov/communication/literacy/issuebrief/ 77 million people Office of Disease Prevention and Health Promotion http://www.health.gov/communication/literacy/issuebrief survey of health literacy U.S. Department of Health & Human Services http://www.health.gov/communication/literacy/issuebrief/ U.S. Department of Health & Human Services http://www.health.gov/communication/literacy/issuebrief/ U.S. Department of Health & Human Services U.S. Department of Health & Human Services http://www.health.gov/communication/literacy/issuebrief/ National Assessment of Adult Literacy