Sentence 1: Anna was bitten by a fly or mosquito on a hiking trip. 
 Sentence 3: She took Anna to the doctor, where they ran some tests on her 
 Sentence 4:  Thankfully, all the tests came back negative 
 Sentence 5:  Anna was glad she hadn't caught some awful disease! 
 Given Sentence 2: She developed a rash and a fever, so her mom grew concerned.