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.
Flu Symptoms. The most common symptoms of the flu are chills, body aches, dizziness, headaches, nausea, lack of energy, flushed face, nausea and vomiting. Other symptoms may include asthma, heart failure, sweating, stuffy nose, loss of appetite and muscle aches. General symptoms last for about two to four days and then subside.