Now, why would we want to basically take that pathogen and place it in our stomach as a result of swallowing? Well, because inside our stomach we have parietal cells and these parietal cells basically secrete gastric acid, hydrochloric acid, HCL. And this HCL creates a very acidic environment inside our stomach and most bacterial cells and pathogens will not survive in this acidic environment. And so that's why we want to swallow that mucus or food that contains the pathogens because we know that pathogens will eventually die as a result of the high acidity of that stomach. So basically the PH is around to inside our stomach when the stomach is in the process of digestion. So we see that these barriers don't only prevent the pathogens from actually entering our blood and our tissue, but they also create an inhospitable environment in which pathogens cannot actually grow.