 [ Symptoms ] can an adult have 103 fever with the flu  my 40 year old daughter came back from israel warsaw and jordan saturday evening started feeling sick monday morning had 102 fever monday evening had severe diarrhea tuesday went down last night to 99 with taking advil every 6 hours this morning wednesday she has 103 1 fever she had the flu shot do adults run that high a fever with the flu do you think she picked up something when out of the country i am very worried [ Disease ] you will want to shop for insurance through the marketplace go to healthcare gov to begin your search