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POPSPatch puts a stop to Montezuma's revenge While it may not solve the problem for everybody, it will certainly be a relief for many. A patch like this could be the sort of thing that can support a child's immune system and allow it to strengthen after it has been weakened by starvation, and diseases such as this. Giving food the chance to be absorbed and rebuild, rather than being ejected undigested, with enough water to cause critical dehydration.