They called him 'Mick'. He's not an albino koala, which are, apparently, quite common. He was instead an extremely rare white-fur koala. His rarity meant that when he was he brought into a koala care 'hospital' for treatment, outside Sydney, the few staff members involved had to basically swear to keep his presence secret.
Because if word got out that 'Mick' was at the hospital, there was a very real risk that traders in blackmarket Australian fauna would raid the place to get their hands on this rarest of koala bears.
According to this report, 'Mick' was given "round-the-clock security protection in case anyone tried to steal him and sell him to a collector for his novelty value."
The good news is that 'Mick' underwent an operation, recovered to full health and has been returned to the wild.