Bats are carrying a family of deadly viruses that could trigger an AIDS-like disease in koalas and wipe out the already-vulnerable population. The viruses that have been found in bats can trigger the koala retrovirus called KoRV, which exposes them to cancer, chlamydia, infertility, blindness and kidney failure. Scientists believe bats transmitting an infectious retrovirus could be a greater threat to the koala population than the recent bushfires, which killed ...