Everybody probably already knows this, but oil of rosemary is strongly anti-viral, anti-bacterial, and anti-fungal, as are many spice oils.
I put oil of rosemary on cuts, scrapes, rashes, etc. It's handy for
delicate areas where oregano oil is too strong.Using the spices in food
supports the immune system, but it's tough to get enough that way.
Many spices are available in powder form in capsules. Look for those in
veggie-caps as those are typically higher quality than you get in standard
gelatin capsules. Turmeric has been shown in the labs to be the number
one thing one can do to prevent both heart attacks and cancer.