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There are already signs of emergence of diseases that are highly dangerous and have not been seen in Europe for a long time: cholera on the Greek islands, dysentery in Vienna. There is also talk about other, even more severe diseases, also there are some differences related to geography, various parasites, protozoa that are common and are not dangerous in the bodies of these people, (but) may be dangerous here. Which doesn't mean there is a need to discriminate anyone, but you need to check.