Aida Catalina Hernández, doctoral student, commented that "after a spit sample is taken a washing procedure is done and nano silver particles are added which are the main component for this to work."

Researchers at the Autonomous University of San Luis Potosí were able to create a method to detect breast cancer through saliva.
Patient Kery Guadalupe explained that she only gave "a spit sample for the detection of cancer, it is a non-invasive procedure, it is simple and gives you a way to know if you are prone to having breast cancer." More information.