My point of confusion is still my initial question. It was actually the description of the mechanism, as given, that had me questioning it's effects on the overall toxicity/danger of ingesting the drug.
"Our vaccine is able to generate anti-fentanyl antibodies that bind to the consumed fentanyl and prevent it from entering the brain, allowing it to be eliminated out of the body via the kidneys. Thus, the individual will not feel the euphoric effects and can ‘get back on the wagon’ to sobriety,” said the study’s lead author Colin Haile"
They clarify that this causes a user to not feel the positive effects of the drug, but I would assume that if the drug was also able to prevent overall mortality, they would be excited enough to mention it.
"Our vaccine is able to generate anti-fentanyl antibodies that bind to the consumed fentanyl and prevent it from entering the brain, allowing it to be eliminated out of the body via the kidneys. Thus, the individual will not feel the euphoric effects and can ‘get back on the wagon’ to sobriety,” said the study’s lead author Colin Haile"
They clarify that this causes a user to not feel the positive effects of the drug, but I would assume that if the drug was also able to prevent overall mortality, they would be excited enough to mention it.