Essential oils can be helpful on three levels in the presence of viruses and bacteria:
1. Many oils are anti-viral and anti bactericidal, among them Manuka, Tea tree, Bergamot, Ravensara and Eucalyptus.n Eucalyptus globulus and Bergamot in particular kill airborne bacteria.
2. Essential oils are often immuno-stimulant so they can help the body fight off an infection and viruses have no place to make their home if the immune system is strong.