Critically endangered species

Koala (Photo: mihtiander / Getty Images) A vaccine to treat chlamydia in Australia’s koala population has been approved, marking a world-first. According to Sky News, researchers developed the vaccine to protect the marsupial, as chlamydia accounts for half of koala deaths in the country’s wild populations. Koalas are also vulnerable to habitat loss, attacks from animals, and vehicle collisions. The species was declared critically endangered in 2022.