Fever as friend
is a natural body response to infection and helps by speeding the metabolism to meet the bodies needs.
Germs also grow slower & reproduce less often in a heated host, allowing the body time to mount its defenses & attack the germs. A 1yo can tolerate temps from nl to 105, although they get grumpy at the high end. As long as your kid takes fluids well & plays some you can monitor at home.