Blood serum concentrations are much lowerâonly about 0.4% of the body's potassium is found in blood serum. As noted above, hypokalemia can be caused by the sudden uptake of potassium ions from the bloodstream by muscle or other organs or by an overall depletion of the body's potassium.
Early symptoms of the flu may include conditions such as excessive or sudden fatigue or body aches and chills, according to Healthline. While fatigue can be an early symptom of a cold, in people who have the flu, the fatigue is much worse.
Influenza, better known as the flu, can cause the following symptoms: fever; fatigue; headaches and body aches; cough; sore throat; runny nose; stuffed-up nose; Vomiting and diarrhea are possible symptoms of the flu, too, though they're more common in children. The symptoms of the flu can come on very quickly.