my immediate question was whether fentanyl is unique in that a vaccine can be developed for it. From [1] we read "Vaccines for cocaine, methamphetamine, nicoti

my immediate question was whether fentanyl is unique in that a vaccine can be developed for it. From [1] we read "Vaccines for cocaine, methamphetamine, nicotine and others have all been tested in rats and, in some cases, people." Reading further, [1] says these vaccines have not yet been successful. [1] https://theconversation.com/a-new-fentanyl-vaccine-looks-promising-but-treating-drug-addiction-needs-a-more-complex-approach-238350 https://theconversation.com/a-new-fentanyl-vaccine-looks-pro...