So many of the hurdles have already been overcome -- particularly the "yuck factor" and the fear factor.

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It also allows self reporting with a slider you can set to Awful, Sick, Yuck, Meh or Good and options to share specific symptoms.

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There is of course what Prof Davies called the yuck factor.

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As expat Canadian Sandra Yuck, who owns the exquisite Lao crafts store Caruso Lao, observes, big developments are coming to this little town, now the focus of so much world interest.

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And driving a car that uses (yuck again) gasoline!

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And then there was the duck that dated back to June (yuck), two week old tomato sauce (retch), expired peanut dressing, and an improperly functioning freezer to name but a few of the violations.

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For all the talk of superorganisms (and despite the yuck factor of what is being moved from one body to another), transplanting a microbiome is far easier than transplanting a heart or a kidney.

ECONOMIST: Modern medicine