I know 10 years is the standard CBO timeframe but are we sure it's the correct one for a drug like this? If you gave a vaccine 100% effective against cancer to

I know 10 years is the standard CBO timeframe but are we sure it's the correct one for a drug like this? If you gave a vaccine 100% effective against cancer to 18 year olds it would probably look like a money loser on a 10 year timeframe but that's clearly not the window to measure.