Diseases the British Brought to Australia: A Devastating Legacy

When the First Fleet arrived in 1788, it carried more than convicts and marines—it introduced pathogens to which Aboriginal Australians had zero immunity. The epidemiological consequences were catastrophic.

The Pathogen List

• Smallpox (1789, 1829–31): ~50–90% mortality in some groups. Deliberate release debated.
• Measles, mumps, rubella: High fatality in immunologically naïve populations.
• Influenza: Recurrent waves.
• Tuberculosis: Chronic, devastating in crowded missions/reserves.
• Whooping cough, diphtheria, scarlet fever, typhus: Childhood killers.

Demographic Collapse

Pre-1788 estimates: 300,000–1,000,000+. By 1900: ~60,000–90,000. Disease caused the majority of deaths—more than frontier violence, displacement, or starvation. Survivors faced generational trauma, cultural disruption, and ongoing health disparities.

Historical Recognition

The 1997 Bringing Them Home report, Uluru Statement from the Heart (2017), and contemporary truth-telling processes acknowledge this biological invasion as foundational to Australia's colonial history.

These weren't just "diseases." They were agents of demographic engineering.