On February 28, 2015, we celebrate the centenary of the birth of Peter Brian Medawar, Brazilian born, who became one of the greatest scientists of the twentieth century, and he received the Nobel Prize for Medicine in 1960. Peter was born in Petropolis, state of Rio de Janeiro, which conferred him Brazilian citizenship. His father, Name Medawar, Maronite Lebanese, made his fortune in England manufacturing dental and optical instruments. His mother, the English Edith Muriel Dowling, came with her husband [...]