“Health efforts are close to wiping out polio, but two significant challenges remain: money and the operational logistics of getting the vaccine to people who need it,” CNN writes in an article examining “how far we’ve come with polio and what’s left to be done.” The news service provides statistics of polio infection globally and a history of polio in the U.S., and compares polio eradication efforts to those of other diseases. “The World Health Organization has an action plan for the next 18 months that could very well lead to eradication, says Oliver Rosenbauer, spokesman for polio efforts at the organization,” the news service writes and highlights a number of challenges moving forward (Landau, 7/30).