Eucalyptus leaf contains chemicals that might help control blood sugar. It also contains chemicals that might have activity against bacteria and fungi. Eucalyptus oil contains chemicals that might help pain and inflammation. It might also block chemicals that cause asthma. - 0.4% to 0.6% eucalyptus extract can improve bad breath in some people.
More info--- https://www.webmd.com/vitamins/ai/ingredientmono-700/eucalyptus
Eucalyptol (1,8 cineole), an essential oil component in eucalyptus oil inhibits Main viral proteinase (MPro/3 CLpro) ,this reaction is known by docking study. Its also well known by animal studies and clinical studies about its potentials to fight the upper respiratory infections specially to clear the tract.
But to have a clear picture, further research protocols are to be solicited.
Dear all, this document provides actual information on 1,8-cineole as an anti-inflamatory cure. My Regards
https://www.researchgate.net/publication/262385819_Anti-inflammatory_Properties_of_the_Monoterpene_18-cineole_Current_Evidence_for_Co-medication_in_Inflammatory_Airway_Diseases