Australia Detects Polio Virus in Sewage Waste After 50 Years

Darwin, 13 May : Health authorities in Western Australia have confirmed the detection of poliovirus in wastewater in Perth, marking the first such finding in more than 50 years in the country.

The positive sample was identified in mid-April 2026 at the Subiaco wastewater treatment plant in central Perth, a busy urban area home to numerous hotels, businesses, and restaurants. According to Australia’s national broadcaster ABC, this is the first detection of poliovirus in Australia in over half a century.

Wastewater Treatment Plant In The Heart of Perth.

The strain has been identified as a vaccine-derived poliovirus type 2, a variant that has previously been detected in parts of Africa, Europe, and Papua New Guinea in recent years. Health officials believe the virus likely entered the sewage system through an international traveler rather than indicating local community transmission.

Western Australia’s Director of Health, Dr. Clare Huppatz, described the finding as “significant” but emphasized that it does not currently pose a serious public health threat. She pointed to the state’s high childhood vaccination coverage—approximately 92%—along with modern sanitation systems and strong disease surveillance as key protective factors.

The Australian Medical Association’s Western Australian president, Dr. Kyle Hoth, also confirmed that there is no evidence of any related illness or outbreak at this stage, urging the public not to panic. The World Health Organization is reportedly monitoring the situation to determine whether this represents an isolated incident.

Health authorities further noted that many countries use oral polio vaccines containing weakened live virus, which in rare cases can mutate into vaccine-derived strains, particularly in under-immunized populations. Australia, however, currently uses an inactivated polio vaccine administered by injection, which does not contain live virus.

Polio infection is often asymptomatic or causes only mild illness, but in rare cases—about 1%—it can lead to permanent paralysis or death.

Australia has been officially polio-free since 2000, with the last recorded outbreaks occurring in 1956 and 1960, and no documented community transmission since 1972. Authorities plan to intensify wastewater monitoring as a precaution and continue emphasizing the importance of vaccination and booster doses, particularly for unvaccinated individuals and healthcare workers.