https://novaglobalnews.com/news/science/major-us-trial-shows-vagus-nerve-stimulation-offers-70-improvement-for-severe-de 2026-07-05T01:44:25.353Z https://www.sciencealert.com/images/2026/07/Vagus-Nerve-Science-Photo-Library.jpg Major US Trial Shows Vagus Nerve Stimulation Offers 70% Improvement for Severe Depression