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Brittany Yeager was leading a troop of girls at Girl Scout camp in Idaho last summer when a mosquito bite upended her life.

Once a runner, hiker and math wiz, Yeager, 30, now takes 23 pills a day to manage symptoms that include paralysis, pain, seizures, muscle spasms, depression and memory problems. She recently learned to stand again and take a few steps, but she relies on an electric wheelchair to get around. She leans on her husband and in-laws to help her take care of her two children: a 7-year-old son and a daughter who is 10.