The truth is that Eucalyptus Polybractea has been used since ever. The Aborigines of Australia have been using the leaves of this eucalyptus specie for their antiseptic and healing actions. In the mid-1800s, plantations of Eucalyptus trees were planted as a strategy to halt the spread of malaria.
https://www.queenb.com.au/collections/eucalyptus-essential-oils