About 1 in 5 people who are infected will develop a fever with ??? headache, body aches, joint pains, vomiting, diarrhea, or rash ??? Less than 1% of people who are infected will develop a serious neurologic illness such as encephalitis or meningitis ??? About 10 percent of people who develop neurologic infection due to West Nile virus will die.??? This means less than 0.1 percent of people who ge