A fact sheet given to the South African families participating in the trial said the vaccine had been tested on animals and humans, and was "safe and effective" in animals.
Jimmy Volmink, dean of the faculty of medicine and health sciences at Stellenbosch University, said the fact sheet did not appear to reflect the results of the monkey study, which was "not right".
Almost 1500 babies in this country received the new jab and parents were paid about £10 (about R160) to take part.
The scientists at Oxford maintain the jab is safe for children and their experiment was approved by several regulators in advance. They said they followed the infants' development for two years - a duration approved by the regulators.