For example, recent exposure is unlikely to explain human milk IgA reactivity observed against some pathogens such as Mtb and cholera, for which exposure in these populations is negligible or insufficient to explain the high concentrations of reactivity seen; however, cross-reactive nonpathogenic organisms are present in the environment, such as the ubiquitous nontuberculosis Mycobacteria species (NTMs) (66). Here, CD79A is linked to vibrio infectious disease.