STRONGLY antiviral. Useful for chronic respiratory conditions, and sometimes helpful in cases of asthma. (Try this with care, as ANY essential oil can trigger an attack with some subjects.)
Phillipe Mailhebiau suggests a blend of Eucalyptus Radiata and Ravensara diluted in any Carrier Oil as a massage rub for anyone showing symptoms of the flu. Dr. Vivian Lunny recommends Ravensara for treatment of herpes zoster. (If there is severe inflamation, add a bit of Roman Chamomile to the blend.) Dr. Lunny also recommends Ravensara, blended with Neroli, Myrtle, and Rosewood for the treatment of Chronic Fatigue Syndrome. Other sources recommend the Ravensara as both a tonic for the nerves, and as a remedy for physical, nervous, and mental fatigue.
Many authorities recommend a very strong dilution of Ravensara Aromatica blended with Calophyllum as the best treatment for shingles.