Experts emphasize the urgency of deploying the vaccine quickly to at-risk populations, with plans to start extensive vaccination efforts within the next year.

This vaccine development aligns with broader conservation efforts, such as the proposed Great Koala National Park in New South Wales, which aims to protect over 12,000 koalas from threats like habitat destruction and bushfires.

Australia has approved a groundbreaking single-dose vaccine developed by University of the Sunshine Coast scientists to combat chlamydia in koalas, a disease that has severely impacted wild populations.

The vaccine aims to reduce infection rates, which can reach as high as 80% in wild colonies, and is expected to significantly lower disease-related deaths.

The Australian government has allocated $76 million toward koala conservation, funding vaccine development, habitat restoration, and population monitoring.

Authorities plan to implement large-scale vaccination programs in Queensland and New South Wales by the end of 2026 to help conserve the declining wild populations.

This disease can also be transmitted from mother to offspring, further threatening the survival of wild koalas.

Field studies show the vaccine trains koalas' immune systems to recognize and fight chlamydia, decreasing the likelihood of infection and halting or reversing disease symptoms, with up to a 65% reduction in mortality.

Recent estimates suggest there are between 129,000 and 383,570 koalas across Victoria and South Australia, though some counts may be inflated.

Koalas, once numbering in the millions, have seen their population decline to fewer than 60,000 today due to threats including disease, habitat loss, vehicle collisions, and attacks by dogs.

They are currently listed as endangered in Queensland, New South Wales, and the ACT, with habitat loss and disease being major threats.

Chlamydia causes severe health issues in koalas, including painful urinary infections, blindness, infertility, and death, and is a major factor in their population decline.

Veterinarians treating sick koalas report conditions such as blindness, malnutrition, bladder infections, and urine burns, highlighting the importance of the new vaccine.

The vaccine's clinical trials involved the largest and longest study of wild koalas, demonstrating its potential to significantly curb the epidemic.