Method of measuring the efficiency of gas mask filters, respirators and other personnel protective equipment

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This application relates to antiviral tissue paper comprising a water soluble metal ion as an antiviral agent. The water soluble metal ion has at least one hydroxide ion formation constant wherein the hydroxide ion formation constant is at least 10<12>. When added to tissue the water soluble metal ion has the ability to kill certain strains of viruses which come into contact with the tissue.

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