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Continue to ChatOne bit of advice someone gave me - which I haven't yet tried - is that if you go to an area where you might pick up a tummy bug, you should seek out the local probiotic yogurt. Eating it will introduce you to the local gut flora, apparently. - Anthony Head from https://whatsmyquote.com/quote/one-bit-of-advice-someone-gave-me-which-i-haven-t-yet-tried-is-that-if-you-go-to-an-area-where-you-might-pick