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.
When you get a cold or other upper respiratory infection, it usually starts out slowly. You may feel a headache, a mild sore or irritated throat, some congestion or any number of other cold symptoms. They start out mild and get worse after two to three days and then gradually go away. That is not how the flu starts. The real flu - influenza - comes on suddenly and in full force. Most people feel completely normal when they go to bed and then wake up in the morning feeling like they were hit by a truck. A majority of people who have the flu will have a fever, body aches, headache and cough. Congestion is a symptom as well but is often not severe. Contrary to popular belief, vomiting and diarrhea are not common symptoms of the flu. They are more common in children with influenza but only occur in about 10% of people that have it. If your primary symptoms are vomiting and diarrhea, you most likely have a gastroenteritis - or stomach virus.