Feel free to search for Tonic (Quinine) Syrup recipes
Only need cinchona bark from the internet (for the quinine), the rest should be able to be bought locally
-
Peeled zest of grapefruit/limes/lemons (for the quercetine, another zinc ionopohre)
-
Chopped lemongrass
-
Some allspice berries
-
Some cardamom pods
-
Some dried lavender
Some people add fresh ginger root
Look up the health benefit of each ingredient (all are base ingredient of some medicines, and all help vs bacteria/virus infections)
Combine it with some Zinc, and all anons will be fine when a Rhino, influenza, or Corona pandemic kicks in.