@flo I personally think you have asked a GREAT question, but then I have been considered a nuisance on this board for some time. I am going to answer first in terms of my personal calculations and then try to generalize my answer.
I am in favor of vaccination and doctor-assisted suicide. Neither decision is based on religious considerations. I was an engineer in my working career (I retired about six years ago), and I became a full-blown atheist about 20 years ago. before that, I would be considered an agnostic. I get extremely impatient with people who base their decisions on any ancient, not necessarily logical thinking.
Now back to your question. Since I support both, I guess you would not consider me inconsistent? If a person opposes vaccination on religious grounds and supports doctor-assisted suicide, I certainly see an inconsistency. However, if a person opposes vaccination on a personal evaluation of the risks as they apply to him/her, then there is no inconsistency.