When some disease spread around the town, Group A people were not affected by the diseases, while Group B people were affected and had to takemedicine to protect them against the disease. What could be the possible reason behind this different response towards the disease?

When some disease spread around the town, Group A people were not affe

1.	When some disease spread around the town, Group A people were not affected by the diseases, while Group B people were affected and had to takemedicine to protect them against the disease. What could be the possible reason behind this different response towards the disease?
Answer» When some disease spread around the town, Group A people were not affected by the diseases, while Group B people were affected and had to takemedicine to protect them against the disease. What could be the possible reason behind this different response towards the disease?