Māori people peaceful tribes from their productive turangawaewae, such as the Moriori in the Chatham Islands by invading forces from North Taranaki, had a catastrophic effect on these conquered tribes. At the same time, the Māori suffered high mortality rates for new Eurasian infectious diseases, such as influenza, smallpox and measles, which killed an unknown number of Māori: estimates vary between ten and fifty percent. The spread of epidemics resulted largely from the Māori lacking acquired immunity to the new diseases. A huge influx of European settlers in the 1870s increased contact among many of the indigenous people with the newcomers. Te
Influx of disease in the Caribbean almost assured the likelihood that people in these areas would be exposed to the diseases. While the Africans were genetically protected, the Europeans were not. Many Europeans living in the new lands would contract the diseases and die. The resistance of Africans to these diseases, which allowed them to survive and work in infested areas where Europeans couldn't, ironically increased their usefulness there and caused increased slave trade. The introduction of these two diseases into the Caribbean changed the ethnic makeup of the area, and decimating the indigenous population. Influx of disease in the Caribbean The Atlantic slave trade brought