heyflick began deriving these cells.the fine print in the conflict, this will become important, it looks boring but it says when this contract is up, the contractor, heyflick agrees to turn over to the government any materials developed under this contract. file that in your mind for a minute. his ambition was to turn his normal human cells into many vaccine factories that could pump out viruses for vaccines and really quickly virus reproduction, viruses can't replicate except inside cells. if you want to make viral vaccines which consist of weakens live viruses, you got to have the reproduced in quantity, there was a problem. the rhesus monkey whose kidney cells were used to make the polio vaccines which were the great public-health victory of the day had been discovered to house silent monkey viruses and these viruses were thought to be not harmful to humans. they were multi-viruses. then on the left, polio vaccine scientist discovered a virus in these cells that actually caused laboratory hamsters to develop tumors an