I credit Gaia Herbs for my super strong immune system. I'd been taking Everyday Immune twice a day for about a year, plus some Elderberry Syrup doses during flu seasons, when Covid hit. I worked for most of the 2 years of Covid in a small, poorly ventilated, retail setting with staff and customers who more or less wore more-or-less masks. (Some would lift a chiffon scarf over a mouth when they wanted to talk with me in the aisle.) I never got Covid. I credit this plus the Extra Strength Elderberry Gummies I took religiously over those many months. Of course I was also taking several other Gaia Herb products - Adrenal Support (both daily and nightly), extra strength turmeric, ashwagandha. Gaia Herbs didn't offer liquid extract of andrographis (another viral defense herb), so I took HerbPharm's of that daily also. BTW, I'm 78. And I am a long-time fan of GaiaHerbs.