Cookie do you mean Helicobacter Pylori, it’s very common and many people test positive to it (me being one) but many more don’t even know they have it until they get symptoms. It will show up in a blood test but test is simple (a breath test) and they give you antibiotics. I also had to have an endoscopy.helicobacter pylori https://www.google.com/gasearch?q=helicobacter%20pylori&source=sh/x/gs/m2/5#ebo=0