Australia has had jamborees going back to 1934. Except during World War II, they have generally been held every three years. The following issues are official.
2007 Australia Jamboree Elmore, Victoria
2010 Australia Jamboree Cataract Scout Park Sydney, New South Wales
2013 Australia Jamboree Maryborough, Queensland
2016 Australia Jamboree Cataract Scout Park Sydney, New South Wales
2019 Australia Jamboree The Bend Motorsport Park Murraylands, South Australia
This patch has a dark blue border. My understanding is that this was a mistake by the manufacturing company, but some of them were still distributed. The official one is the one above with the lighter blue border.
This was also issued for the 2019 Australia Jamboree. This is the Listening Ear group, which is there for the mental health of Scouts if they have issues such as homesickness or other psychological problems.
This was not specifically issued to medical people, but it was for people in charge of health as well as site safety. This was a particularly difficult patch to get from this jamboree.