As I've mentioned before, TF immunity isn't permanent and one has to do a "booster" of them from time to time. I am now having a Herx-like immune reaction to the TF's after only two capsules. This reaction is very strong. I probably should only sprinkle a bit of the powder under my tongue but the taste prevents my doing that. I know the TF's are doing their job based on the reaction.
TF's target Herpes-Family viruses and are much more effective than the antiviral I often take. I get my TF's here in the Store and there is info on them there or in our Library.