The plague with some medication and treatment can be treated within 14 days. Our medical advancements have enabled us to become stronger and fight off thing's that do not belong in our bodies.
Why other choices are wrong: Plague bacteria if consumed by amoeba, can survive and replicate in the soil. Human beings still can be affected by the bacteria that cause plague. And there are rats and fleas always around that carry disease. Not necessarily around, but their droppings can carry such bacteria.
Nativism is the political policy of promoting the interests of native inhabitants against those of immigrants including the support of immigration restriction measures