Exactly. Looking at other things to invest in the opportunity cost right now might already be higher. Say you could have a slightly higher number of Guinea wor

Exactly. Looking at other things to invest in the opportunity cost right now might already be higher. Say you could have a slightly higher number of Guinea worms but stable for 1M a year. The 1M you save might save many more lives if used for something else with a higher impact. At 28 infections per year it's almost guaranteed there's something else that's already much more efficient at preventing deaths.