Garlic is an herb of the onion family. It’s best used raw, the cloves chewed-to release those beneficial qualities-and swallowed. If that is too strong of an experience, make cuts on it, then swallow. Of course, garlic pills are available too in your local supermarket or drug store.
Fresh ginger root is cheap and like Garlic, has a history of thousands of years of medicinal use. It’s been used for colds, flus, and respiratory illness throughout history.