“…A cancer vaccine, as projected by the author [Pelner (91)], would be composed of a cellular suspension of HeLa cells to which would be added Coley's toxins (a mixture of toxins of streptococcus and Serratia marcescens). These would be suspended as a water‐in‐oil emulsion in incomplete Freund adjuvant [mineral oil and Arlacel A, also known commercially as Daroil‐10 (Center Laboratories)].…”