I'll leave the math as an exercise for the reader, but that's a really low mortality rate, orders of magnitude less than even young healthy people who've gotten COVID-19.
25 people that we know about for sure. There were hundreds of cases of Guillain Barré, and many more that weren't definitively linked to the virus. Now scale that to billions of people.
And despite your comment on other subthreads, we don't make these decisions by directly comparing naïve mortality counts. It's not like it's acceptable to hurt N-1 people, just because the virus hurt N people. If a vaccine kills / cripples hundreds of young people, nobody is going to take the vaccine. It's pointless to debate this.
I'll leave the math as an exercise for the reader, but that's a really low mortality rate, orders of magnitude less than even young healthy people who've gotten COVID-19.