Merck and Moderna say cancer vaccine shows signs of preventing recurrence of melanoma

Merck and Moderna say cancer vaccine shows signs of preventing recurrence of melanoma is a developing story being tracked by Unscrolled.

The key point is that new information has emerged around this topic, and the details may matter to readers following the broader situation.

This brief keeps the update short, neutral, and focused on what is known now. More context can be added as verified details become available.