ClimateWire: The hallmarks of a warming climate, heavier rains, more severe droughts, rising sea levels and longer growing seasons, are spreading a variety of pathogens throughout the world. Malaria is moving to the highlands. Lyme disease is spreading across the U.S. Northeast and eastern Canada. Outbreaks of cholera will increase with more unsafe water. Those are three of the diseases that are becoming part of a growth field in medical research amid concerns that tropical diseases are moving north and south...