NFPA Bacteriophage test for protection against blood-borne pathogens

Photo courtesy of W.L. Gore & Associates, Inc. and Nelson Laboratories, Inc.
  The NFPA 1999 Bacteriophage Test, or Biopenetration Test (ASTM 1671), uses a surrogate virus approximately the same diameter as hepatitis C, the smallest of the blood-borne pathogens. Pressure is applied on the challenge side (garment exterior fabric) and the reverse side (garment liner side), and scientifically analyzed for penetration to determine if the fabric is resistant to viral penetration.