Might have told you this before... but if you're not already on these, I think you should give them a shot as there's really nothing to lose...
I'll share what I was taking after 6/2/20, but before Aug 2020 that may have contributed to my CVB4 titer decrease
Also, I may have stopped taking some of these between 8/5 and 11/14, I just know my start dates. In case you're wondering why my titers did not continue to fall in 11/14/20.
Most of this I started in July, 2020 (not necessarily for CVB)
LDN - Low Dose Naltrexone
L-Lysine (SuperLysine+) Amino Acid
Vitamin C (Ultra Potent-C 500 by Metagenics)
L-Glutamine
Magnesium Malate
Garden of Life Critical Care 80 Billion CFU Dr Formulated Probiotics (15 Probiotic Strains; Colon Health, Immune System)
Azithromycin (Zithromax)
Quercetin (flavonoid)
Extract of Ginkgo biloba (EGb), Standardized Extract