Check out thieves oil and how that was used in the Spanish Flu pandemic.

Nobody could explain why the gypsies that were tasked with burying the corpses killed by the virus were not getting sick.

It was attributed to a blend of essential oils they would put on their bandanna masks, called Thieves Oil.

It's the only thing they did differently than the rest. I'd say that's evidence when you actually go and break down what Thieves Oil is and how each one of those works together.

I keep it going in the diffuser here. Can't hurt, smells nice what have you got to lose.