Different viral and bacterial infections behave and transmit differently and will use different routes of contamination. Our product selection process utilizes data obtained during testing to identify manufacturers and products that will be suitable for the level of protection required in any given situation. The standard contains four tests, each of which measures resistance against different types of contamination. USPGI uses data from all four tests to determine which products have achieved the highest level of classification. In selecting our products, we look for garments that are not only certified to EN 14126, but have also achieved a good classification in the ISO 16604 test. ISO 16604 is the only test providing a clear indication of effective resistance to penetration of that size of infectious agent.