Moderna shares plunge after cancer vaccine data leaks — despite positive results

Moderna released full data on its closely watched cancer vaccine developed with Merck.

# Moderna shares plunge after cancer vaccine data leaks — despite positive results Moderna released full data on its closely watched cancer vaccine developed with Merck. **Read the full article:** [CNBC](https://www.cnbc.com/2026/10/22/moderna-stock-cancer-vaccine-data-leak.html) *This article was originally published by CNBC. MoneyWiseInc provides expert curation of the best financial content from trusted sources.*