Design Viruses That Affects Only Cancer Cells?
Oncolytic virotherapy had been tried long a go, however, with advances in biotechnology, it became more feasible. Oncolytic viruses are also capable of inducing an anti-tumour immune response.
Specific question then is, how to design such selective oncolytic viruses?
General approach could be -- sequence normal human cells, sequence tumor cells, and attack the difference.
As of 2014, genome sequencing cost has dropped to $1000 per genome. (Google: "genome sequencing price")