Just got over one. Good one day and the next day paralysed by the cold weather,couldn't move couldn't think. Had to go to bed for 3 days. got over it by sitting outside in the sun every day until I felt I was over it. I expect to fall victim again before the winter is over but I will get out in the sun as soon as I feel winters freezing fingers upon me. Iv'e taken to wearing a beanie out side when I am in the garden now. It helps