Swimming is second to walking as the most popular exercise in many countries with millions of annual visits every year. When people swim in pools, waterparks, spas, hot tubs, lakes, rivers, and the ocean, they share the same water. If someone is ill, he or she can contaminate the water for everyone who is swimming.
Swimming in contaminated water can result in skin, eye, ear, and certain intestinal infections as diarrhoea, particularly if the swimmer's head is submerged. Generally, for infectious disease prevention, only pools that contain chlorinated water can be considered safe places to swim. Travellers who swim should be advised to avoid beaches that might be contaminated with human sewage or with dog feces.
Travellers should also be advised to avoid
wading or swimming in freshwater streams, canals, and lakes that are likely to be infested with the snail hosts of schistosomiasis (bilharziasis) or contaminated with urine from animals infected with Leptospira.
changing diapers of children near pools
Biting and stinging fish, corals, and jellyfish can also be hazardous.
to swim alone
be under the influence of alcohol or drugs.
dive or jump into an unfamiliar body of water without first determining the depth (at least 9 feet for jumping and diving) and the terrain, and whether there are any hidden obstacles.
ponds or stagnant hot water with risk for Nagleria
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