It appears only in people of low stature who live near the Liang Bua cave, where Homo floriensis was discovered. It is now weaker, but this genetic signal can still be detected in the DNA of Australian Aborigines, East Asians and Andaman Islanders. This has led scientists to tentatively conclude that EH1 probably occupied a region in northern India, where they were met by a group of modern humans - a migratory branch that reached Asia, Australia and the Papuan islands (1 on the map above). It also appears that modern humans interbred with the Denisovans in a number of places, such as East Asia, the Sundaic Shelf and the Philippines (2, 3 and 4 on the map). The evidence for EH2, an extinct hominin that interbred with modern humans on Flores, is somewhat less clear. It appears only in low-grade individuals who live near the Liang Bua cave, where Homo floriensis was discovered. So it is a strictly localized phenomenon, and has somehow managed to be contained for about 50,000 years since the two groups met (5 on the map). https://www.sciencealert.com/two-unknown-species-of-ancient-extinct-hominids-have-been-identified-in-modern-dna