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in this day, babies are likey to be less

in this day, mothers are likely to be less

preventative médecines against what disease has had enormous beneficial effects

small pox was endemic to some populations, what does endemic mean

therefore, these populations slightly what

how lethal was small pox to endemic populations

how lethal was small pox to non endemic populations

give an example of a non endemic population to small pox

who and when began the global vaccination programme with intent to eradicate small pox

this virus is now what