Immediate Answer: A massive July 2026 review published in The Lancet has officially confirmed the long-term safety profile of mRNA vaccines after analyzing billions of doses. The study found that serious adverse events remain "exceedingly rare" and are significantly outweighed by the vaccines' protective benefits. Furthermore, this clinical validation is now accelerating mRNA-based personalized cancer treatments, with over 120 trials currently underway. What Happened: In a la
