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flag A fentanyl vaccine enters human trials in 2026, training the immune system to block the drug’s effects and prevent overdoses.

flag A first-of-its-kind fentanyl vaccine is set to begin human clinical trials in 2026, aiming to prevent overdoses by training the immune system to block fentanyl’s effects before it reaches the brain. flag Developed by ARMR Sciences and the University of Houston, the vaccine uses a synthetic fentanyl fragment and immune-boosting agents to stimulate antibody production. flag Unlike naloxone, which reverses overdoses after they occur, this preventive approach could reduce fatalities, especially as fentanyl is increasingly found in other drugs without users’ knowledge. flag Trials will evaluate safety and effectiveness in blocking fentanyl’s impact.

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