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The selected region located in central India, the UK and worldwide. The sample size was relatively small, considering the high population in these areas. The MMR vaccine has consistent result reducing the number of cases. Additionally, factors such as public awareness, improved hygiene and herd immunity have contributed to decrease in cases.

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The selected region is located in central India, the UK, and worldwide. The sample size was relatively small, considering the high population in these areas. The MMR vaccine has consistently shown results in reducing the number of cases. Additionally, factors such as public awareness, improved hygiene, and herd immunity have contributed to a decrease in cases.

Sure! Here's the corrected version of the text:

The selected regions are located in central India, the UK, and worldwide. The sample size was relatively small, considering the high population in these areas. The MMR vaccine has consistently resulted in a reduction in the number of cases. Additionally, factors such as public awareness, improved hygiene, and herd immunity have contributed to a decrease in cases.