Blood & Fog: The Military’s Germ Warfare Tests In SF
By Rebecca Kreston in Discover Magazine - Over a period of six days in September 1950, members of the US Navy sprayed clouds of Serratia from giant hoses aboard a Navy minesweeper drifting two miles along the San Francisco coastline, a bacterial fog quickly enveloped and disguised by the region’s own mist. By monitoring the air at 43 scattered sites throughout the region, the Navy found Serratia bacteria blown throughout San Francisco and extending to the adjacent communities of Albany, Berkeley, Daly City, Colma, Oakland, San Leandro, and Sausalito (3).
In this regard, the experiment was a success: the San Francisco Bay was identified as a highly susceptible site for a germ warfare attack and a quantifiable range for the airborne dispersal of microbes was established.