Patented 9-7-1909 by William Hilliard Munro of Sault Ste. Marie, Ontario, Canada and 10-4-1910 by John Boulieu, of Sault Ste. Marie, Michigan Good Plus with stamped former owner's name. (similar to S362) 0227. LAKE SUPERIOR WRENCH COMPANY - SAULT STE. MARIE, MICHIGAN - PAT. APPL...
viable virus is certainly a pre-requisite for being infectious, but it is only indirect evidence of infectiousness—what we want to know is what happens in the real world.