I do believe it's all of the above. Although, it might not be trouble sleeping. That might be true in some cases, but not in all.
Yes, it is possible. There is something called a relapse. It is when you catch a sickness again after getting rid of the sickness and then it is twice as bad as the first time.
Answer:
a index helps you find ou the meaing of a word or phrase of a story or textbook. this will help you better understand the meaing of the story
Explanation:
hope this helps:)
