Bernice Eddy identifies SV40 tumour-inducing capacity at NIH
NIH virologist Bernice Eddy reports that rhesus monkey kidney cell extracts cause tumours when injected into hamsters. She identifies a contaminating virus — later named SV40. Despite the finding, existing vaccine stockpiles continue to be distributed while new production protocols are developed.
Polio vaccine SV40 contamination (1955-63) →