E. coli frequently lasts 3-4 days, potentially shorter for someone with a strong immune system and potentially longer for someone with a weaker immune system. What we're seeing is that colloidal silver eradicates food poisoning in under an hour. Anyone is welcome to heal as they please including letting a disease naturally run its course, but to us 3-4 days to under an hour is a significant upgrade and we feel compelled to share that option with people.