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 symptoms typically include fever, chills, headache, muscle aches, sore throat, runny nose, and fatigue. Flu symptoms often start with a fever that comes on quickly. As the illness develops, your symptoms will likely be similar to those of the common cold; however, they will likely be more severe.