You sound very youthful even though you say you are 75. I think that the problem is, even though you are young at heart, your body is not totally young anymore and at 75 you are at risk of getting the flu more frequently and more severely. I suggest that you take the flu shot next year (if you did not do so this year) and take a daily supplement of Vit C and Zinc. Good luck and I hope you will stay healthy for the rest of the Winter.
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