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It looks like cold germs lurk everywhere. And there is no cure in sight for the common cold. At the same time developing a sturdy immune system is bound to help. I have seen studies which show that people in comfortable family and social relationships succumb much less easily to colds, to which they were deliberately exposed, than those who do not enjoy them. I find that walking two or three miles a day, in one session, confers considerable immunity. So do a balanced diet and maintaining one's ideal weight.
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