Complex sentence: The earliest recorded artificial induction of immunity in humans was with variolation or inoculation as practiced from ancient times in China and India, and imported into Europe via Turkey around 1720 by Lady Montagu and perhaps others.
Split into simpler sentences: The earliest recorded artificial induction of immunity in humans was by variolation or inoculation. This was practiced in ancient times in China and India, and later imported into Europe, via Turkey, around 1720 by Lady Montagu and perhaps others.