Explain why babies born in different countries may be vaccinated against different diseases

The different countries experience different diseases due to their natural or climatic conditions.

The people residing in different regions of the globe have different genetical formations. They have different epidemiology patterns of the disease.

The babies' genes are affected due to environmental conditions where they live. Each nation develops vaccines considering the health conditions or genetic issues of the people of the nation.

The different genetics response in different manners when applied to people living in various regions of the globe. Therefore, different amounts of enzymes are required for different genetic formations to get the positive effects of vaccines.

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