Australia locks down farms as avian influenza spreads

A test tube labelled "Bird Flu", eggs and a piece of paper in the colors of the Australian national flag are seen in this picture illustration, Jan. 14, 2023.

Bird flu continues to spread in the Australian state of Victoria, where more than 500,000 chickens have been euthanized. Strict quarantine zones restricting the movement of birds and equipment have also been put in place. Australian health authorities say bird flu spreads mainly among wild water birds.