Did measles come in the new world or the old world?

Answer 1

The disease originated in Africa (old world) and spread to tropical areas of the Americas mostly via the slave trade. It is not currently common to other tropical areas like South and Southeast Asia or the Pacific Islands.

Answer 2

It is generally assumed that chicken pox was unknown in the new world until the Europeans arrived there. American Indians at least had not developed any resistence to it.

Answer 3

Measles came from the old world to the new.