How do you know if child has upper respiratory infection or cold?

The same: Some people call an upper respiratory infection a cold, both are usually caused by a virus and treating the symptoms is all that is necessary while your body fights the infection. If your child is has a fever, is having trouble eating or breathing, you should see your family doctor. Colds, and all other upper respiratory infections, are contagious, so avoid coughing/touching or kissing people.