✔ 最佳答案
This is due to the Indian religion, there are strict rules that no contraceptions can be used during sexual intercourse, that's why aids spread around easily in India, and that's also why the population of India is growing at a rapid speed. In those well developed countries, like the US and UK, sex education and safe sex are promoted during teenage to adulthood so people are more aware of issues like this.
參考: Myself.