It is correct and usable in written English.
You can use it when you want to indicate that somebody has a fever. For example: "My little sister has been feeling unwell and she has a fever."
You may also have fever, a headache, and fatigue.
"If they have fever, even for one hour, they should visit me".
"I am asking, 'Does the child have fever and for how long?
All four people have fever and "are pretty sick," Mr. Thompson said.
In addition to cramps and diarrhea, victims often have fever, and they sometimes develop complications in other organs.
He added: "Every one of them will be monitored every day to see if they have fever.
And they would say, 'Oh, you have fever.' They would label it, just like we label it [ADHD] now.
In most cases, people have no symptoms, though some have fever or swelling at the bite site and in rare cases more severe complications.
"It's low technology, but it works: covering your mouth when you cough or sneeze; not going out if you have fever and cough," Dr. Frieden said.
Medical staff will be deployed to check some travellers' body temperature to ascertain if they have fever, one of the early symptoms of the illness.
Patients with nonbacterial, or aseptic, meningitis also have fever, headache, and other meningeal signs, but they are not so obviously ill.
