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Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.
The line drawn across the centre of the kuru-affected region perpendicular to the axis of cultural change separates the area of residual high incidence to the south and low incidence to the north. The kuru-affected area is shown within the black dotted line.