This happens because nobody forces immigrants to adopt hygienic personal habits. They can spend years in camps, manned by their own countrymen, and learnnothing about the culture they live in.
Since 3rd worlders have come flooding into my kids schools, one of my kids has caught a viral skin condition that is prevalent in Africa and almost unheard of in the UK.
There is no “cure” for it and it can take up to 3 years for his body to clear it up.
He is 6 years old.