My daughter (15 months old) has a temperature of 39.2, should i take her to the emergency room?

Depends on details: Fevers are common and have many causes. Most people use over-the-counter drugs like Tylenol, Motrin, or Advil for relief of such symptoms. If a person has had prior infections more than usual, is looking sickly, or is very fussy, she can visit her doctor or the ER for a full evaluation. Each case is individually decided, but mostly based on how she is behaving rather than the temperature number.