Global warming, shifting ecozones and changing the climatology of large reasons, is expected to, and has already shown the ability to, affect distribution and incidence of various diseases. The brain-eating Ameba comes to mind. As it were. There is some new research by Michael Grigg of the NIH that addresses a different change. Along with melting Arctic ice comes an erosion of natural barriers that once separated parasites from hosts. That erosion has allowed at least two pathogens to infect marine mammals they were previously unknown in...