Elianna Grace

As 4-year-0ld Elianna Grace sat in the back seat of the SUV, battling her second fever in three days, her mom flashed back to the coughing and vomiting fit the preschooler had the previous weekend - and to a niggling fear about the girl's sudden illness.

As 4-year-0ld Elianna Grace sat in the back seat of the SUV, battling her second fever in three days, her mom flashed back to the coughing and vomiting fit the preschooler had the previous weekend - and to a niggling fear about the girl's sudden illness.