Should cash-strapped NHS pay for unproven gene sequencing?
Anthony Harvie/Getty You are mutating. As you read this, somewhere in your body mistakes are being made as cells copy their DNA or repair damage from, say, cosmic rays. The vast majority of these mutations don’t matter. But occasionally a cell will acquire mutations that knock out key genes that limit growth, enabling runaway replication that leads to tumours. Cancers, in other words,