A glimmer of hope?, page-36

What is the source of these estimates?
Disease inadvertently introduced did have a major impact on the indigenous population. Moccassian traders visited and traded with the northern clans and Torres Strait islander movements to and from New Guinea probably facilitated the entry of disease for 300+ years.
Some diseases such as yaws and leprosy probably predated European settlement.
'Racism' is now used as a grab-bag slur against many decent people.