san francisco boy leukemia contracted chickenpox livercolored spleen swollen cancer soon returned normal lofty blood cellular telephone count fell levelheaded small fry doctor up laboratory experimental oncology san francisco thrilled sudden remission blessing one month leukemia returned get along rapidly small fry death early much could act cancer patients unless surgeons could excise tumour disease typically spelled swift inevitable close dozens published cases years repair noticed peculiar tendency cancer patients sometimes enjoyed brief reprieve malignancies caught viral infection cooccurrence common viruses sometimes attack tumour prison cell researchers discovered decades tried harness phenomenon transform cancer treatment long string failures nearing success computer virus mastermind kill cancer exciting time said robert martuza chief neurosurgeon massachusetts full general hospital think work tumour cancer cells able replicate wildly ward infection effectively goodly cells scientists looking ways create viruses weak damage healthy cells yet strong enough destroy tumour cells researchers discovered women cervical cancer temporarily recovered sacrifice rabies vaccination midcentury physicians administering live viruses cancer the crab patients however experiments proved ill fated cancer hark back injections caused development lethal infection master of ceremonies ian mohr virologist new york university stumbled way altering crippled virus bring out repeatedly cancer cells young viral mutant evolved power replicate cells engineered way virus evade resistant system making even potent agent oncolytic viruses multiply body gain strength addition attacking cancer cells directly likewise produce resistant response targets tumours