 [ Symptoms ] how do you know when to take a two year old in to doctors that has a fever and a cough  he has had a fever all day ranging from 100 2 103 4 at its peak today he also has a cough [ Disease ] you need to involve his medical provider if you are unclear as to the cause of the symptoms or their significance for instance if a child has a history of asthma or pneumonia they need medical intervention sooner than a child who does not have this history if your two year old had flu vaccine this year he is less likely to get influenza if not he may need to be seen early since influenza can be treated in the first two days so his medical history plays a huge role as well as your comfort in dealing with his fever and cough when in doubt seek medical help