Mucosal surfaces in the gastrointestinal tract are continually exposed to native. commensal antigens and susceptible to foreign. infectious antigens. Immunoglobulin A (IgA) provides dual humoral responses that create a symbiotic environment for the resident gut microbiota and prevent the invasion of enteric pathogens. https://www.jmannino.com/mega-save-KangVape-Onee-Stick-Disposable-3000-Puffs-12mL-special-find/