Background:
International travel is part of modern life, your life. Whether that is visiting family in Europe, business trips to Asia, or a dream vacation to the tropics, these all have something in common. The microbes and germs in these places are different and not what your body is used to at home.
Your body is covered, inside and out, with little microbes that influence your health both mentally and physically (Beaumont et al. 2018. Hathaway et al. 2021). These symbionts (organisms that coexist and interact closely with another organism) are not the same for every person, especially at a global scale. Recent advancements in global sampling of microorganisms has shown that novel and unknown microbes are not only common in the cities of the world but often differ based on the climate, country, and various other environmental factors. Consequently, when a person travels to a new part of the globe, they are exposed to microbes that their bodies may never have seen before and contact with microbes like these can lead to some uncomfortable conditions (Danko et al. 2021).
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