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.
Signs and Symptoms. The flu is often confused with the common cold, but flu symptoms usually are more severe than the typical sneezing and stuffiness of a cold. Symptoms, which usually begin about 2 days after exposure to the virus, can include: fever. chills. headache. muscle aches. dizziness.