Enlarge Image Harboring trouble. A new study suggests venomous cottonmouths may harbor Eastern equine encephalitis virus through the winter. Credit: iStockphoto/Thinkstock Every year as the days grow warmer, the Eastern equine encephalitis virus (EEEV) reemerges along the eastern coast of the United States, where it causes devastating disease in horses and, more rarely, humans. Scientists have long wondered how the virus, which is transmitted by the bite of an infected mosquito, survives the cold, mosquito-killing North American winters. Now, a new study suggests that snakes harbor the virus through the winter, but experts disagree on whether the finding clinches...