"U.S. adults living with chronic disease are significantly less likely than healthy adults to have access to the internet (62% vs. 81%). The internet access gap creates an online health information gap. However, lack of internet access, not lack of interest in the topic, is the primary reason for the difference. Once online, having a chronic disease increases the probability that someone will take advantage of social media to share what they know and learn from their peers."Why is this? One reason (suggested by John Robitscher of the the National Association of Chronic Disease Directors) is that chronic diseases are more likely in poor people who also have a lower liklihood of Internet access. However, even if poverty is a confounder, the benfits of access to health information may be least likely to go where they are needed the most.
See the full report from Pew here.