yeah, there're phytoncides (antimicrobial, volatile (usually) organic compounds) produced by plants like mint.
'So the green mint leaf plant place a very good major role in reducing flu. When I got to the farm and I saw it this much, I was also told that some neighbors come around to fetch them to avoid flu, for their kids. It is very effective.'
spending time around plants, expecially in forests, is a good way of boosting our immune system.