Muscle aches
Also known as myalgia, it is a common symptom in the early phase and later phases of the disease. Patients with an inadequate diet and water intake, existing fever and ongoing viral infection will have fatigue at the cellular level. As a result, they feel always tired and experience muscle aches. Keep in mind this symptom is very unspecific, and most infectious diseases share the same symptom. It is the combination of symptoms that will make the diagnosis.