A recent study by researchers from Texas A&M University presented a new vaccine designed to target the ligand-binding domain of the serotonin 2A receptor (5-HT2AR), which resides in the second extracellular loop (EL2) and was previously identified as the key region for receptor activation. The new candidate, called EL2-5HTVac, was shown to provide a long-lasting and selective therapeutic approach to avoid increased bleeding risk complications.