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.
Distinguishing between influenza and pneumonia signs and symptoms. Influenza, the flu, generally comes on suddenly and it arrives with a fever, dry cough, chills and sweats, absent appetite, stuffy nose, and head-to-toe body aches. Other symptoms that may accompany the flu include diarrhea, headache, sore throat, and nausea.