Table 1.

A tabulation of Medawar's experiments for inducing tolerance by inoculating foetal mice with cells from mice of different inbred strains, from September 1952 to May 1953. The data came from Medawar's laboratory notes stored in Box 43, Folder C156, Peter Brian Medawar Papers, Wellcome Library, London.

CasesInjectedFailedSurvival for 12–14 daysSurvival for 15–30 daysSurvival for 31 days or longer
EMB-853111
EMB-68431
EMB-79651
EMB-1034211
EMB-102761
EMB-100651
EMB-94312
EMB-87431
EMB-77532
EMB-74532
EMB-73633
EMB-6955
EMB-64541
EMB-41761
EMB-180761
Total77564116
Rate of success (all)27.3%
Rate of success (graft survival for 15 days or longer)22.1%
Rate of success (graft survival for 31 days or longer)7.8%