Although Pfizer's protocol called for its team to obtain consent from the parents of the children treated who were too young to sign, few parents could speak or read English. (Compl. P 127.) Plaintiffs claim that Pfizer failed to explain to the children's parents that the proposed treatment was experimental, that they could refuse it, or that other organizations offered more conventional treatments at the same site free of charge. (Compl. PP 3, 117-20, 128-30, 154-55, 157.) After two weeks, the Pfizer team left Kano and never returned for follow-up evaluations. (Compl. P 122.) Plaintiffs allege that five children who received Trovan and six children whom Pfizer "low-dosed" died. (Compl. P 120.) Others suffered paralysis, deafness and blindness. (Compl. PP 16-50.)