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.
Typical signs of flu in children include high-grade temperature, chills, muscle aches, headaches, sore throat, dry cough and just plain feeling ill. Flu may also cause vomiting and diarrhoea. These flu symptoms usually last for three to four days, but cough and tiredness may linger for up to two weeks after the fever has gone away.