Did you know that many essential oils possess powerful air-purifying properties, but some of those can only work properly when varporized, as studies show (Tyagi et al. 2010)? Peppermint essential oil for example has strong antimicrobal powers, but they show most effective when you use it in a diffuser, since the vaporized oil molecules combine with the negative ions in the air.
So start you diffuser right away, if you want to reap all the benefits and dodge flu season!
Be well and see you around!