London: Living in cities helps people develop immunity to diseases, finds a study.Researchers discovered that such people are more likely to have a genetic variant that protects them from tuberculosis and leprosy. They analysed DNA samples from populations across Europe, Asia and Africa and compared rates of genetic disease resistance with urban history.
"It could also help to explain some of the differences we observe in disease resistance around the world." They found that in the areas with a long history of urban settlements, today`s inhabitants were more likely to possess the DNA variant which provides some resistance to infection. IANS
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