Scientists have identified up to 3000 types of bacteria on dollar bills from just one Manhattan bank. Most of the bacteria found were skin, mouth and vagina microbes according to a study conducted by the New York University Center for Genomics & Systems Biology. Bacterial cultures, fungi, and viruses finding transport on monetary exchange systems do not respect or understand borders. There are no visas or passports for microbes that hitch rides from hands, noses, and genitalia. Money travels freely nationally and internationally. Cash is a vector of biological cultures traded globally.