Russian scientists have developed a vaccine for the treatment of cancer that can increase the patient's lifespan more than two-fold ITAR-TASS reported on Wednesday. The vaccine developed at the Institute of Clinical Immunology in the Siberian branch of the Russian Academy of Medical Sciences in Novosibirsk has already successfully passed clinical tests said institute's director Vladimir Kozlov. Currently it is being administered to patients by injection at the third and fourth stages of cancer. 'We are deriving dendritic cells from the human body and loading them with tumour antigens' Kozlov said. (Read: The latest advances in cancer treatments) 'Dendritic cells