PureCare announced the recent certification of its proprietary OmniGuard® Advance mattress cover as effective in blocking viruses such as COVID-19. The PureCare OmniGuard Advance five-sided and total encasement mattress covers attained the Vartest certification that meets ASTM F1671 viral penetration testing standard for resistance to bloodborne pathogens. The ASTM F1671 test method established by the U.S. Centers for Disease Control and Prevention determines whether a fabric can block Phi-X174 bacteriophage, a virus that is about 32 nanometers in diameter. COVID-19 is approximately 125 nanometers in diameter.