Moderna and Merck Just Made History With the First mRNA Cancer Vaccine to Succeed in a Phase 3 Trial. The treatment combines an mRNA shot with Merck's Keytruda. Key points and original sources are listed below.

• Moderna and Merck Just Made History With the First mRNA Cancer Vaccine to Succeed in a Phase 3 Trial. Here's What That Means for Investors.S1

• The treatment combines an mRNA shot with Merck's Keytruda.S2

• The vaccine reportedly thwarted the cancer's return and spread.S3