I've known some people that have had it. My sister had a mild case, like a real bad cold. My team member who is a fairly in shape and a skinny guy in his early 40s had to be hospitalized for breathing and dehydration issues. He went by ambulance, mom had to call 911. He was the type to blow it off too. It's amazing how it just has no rhyme or reason to how it hits people it seems.