Who carried deadly diseases and who had the greatest immediate impact on the Aborigines?

European settlers and colonizers carried deadly diseases such as smallpox, influenza, and tuberculosis, which had devastating effects on Indigenous populations, including the Aborigines of Australia. The greatest immediate impact on Aborigines came from these introduced diseases, as they lacked immunity to them, leading to significant population declines and disruptions to their societies. Additionally, colonization practices, including land dispossession and violence, exacerbated these impacts, further threatening their way of life.