The nose, it seems, is protected by bacterial guards
They are similar to some of the bugs found in yogurt
PEOPLE ARE familiar with the idea of probiotic bacteria, which, if consumed as part of someone’s diet, are supposed to enhance the health of the gut. The gut is home to zillions of microbes of many varieties, and if this microbial ecosystem gets out of balance illness can, indeed, result. Whether consuming probiotic-rich foods such as yoghurts really does promote health is a contested area of science. But the idea that they might do so is plausible.
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From the June 13th 2020 edition
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