Behind the Most Exciting Stock Pop in Years

Moderna Inc. doubled the list price of its RSV vaccine, mRESVIA, to around $640 per dose in the U.S., aiming to reflect mRNA technology value and offset development costs. Shares surged, but analysts warn of potential payer pushback. The vaccine's uptake has lagged behind rivals like GSK and Pfizer, with 2023 sales under $25 million. A European Commission contract for up to 24 million doses offers a lifeline. Moderna targets 10% growth in 2026, with RSV and other respiratory vaccines as key cont

Moderna (MRNA) and Merck (MRK) announced positive Phase 3 trial results for their personalized mRNA cancer vaccine, Intismeran Autogene, combined with Keytruda. The treatment extended survival without melanoma recurrence. MRNA stock surged 177%, MRK rose 12%. The vaccine's personalized nature and high cost may pose insurance coverage challenges. FDA approval is expected in 2027-2028. The treatment is not yet commercially priced, with estimates exceeding $150,000 per patient.

The FDA approved Moderna's mRNA flu vaccine, citing 26.6% higher efficacy than traditional vaccines. However, an analysis of trial data revealed a statistically significant increase in serious adverse events (SAEs) in the mRNA group. The FDA used pooled data from multiple trials to dilute this safety signal, despite acknowledging potential variations. Concerns also arise from higher mortality rates in mRNA groups across trials.

Merck and Moderna reported positive Phase 3 trial results for a personalized mRNA vaccine targeting melanoma, combined with Merck's Keytruda. The treatment improved recurrence-free survival, marking a potential first FDA-approved mRNA cancer therapy. The vaccine is customized using a patient's tumor DNA and RNA, teaching the immune system to target cancer cells. Costs and production time remain high, but experts anticipate advancements in manufacturing and AI-driven targeting.

Moderna and Merck's mRNA therapy intismeran, combined with KEYTRUDA, met Phase 3 trial endpoints for recurrence-free and distant-metastasis-free survival in high-risk melanoma patients. The trial enrolled 1,137 participants, but exact benefit sizes were not disclosed. The companies plan to present detailed data later. Intismeran is not yet available outside trials.

The FDA approved updated COVID-19 vaccines for the 2026-2027 season from Moderna, Pfizer, and Novavax-Sanofi, targeting the XFG subvariant. Pfizer's Comirnaty XFG, Moderna's SpikeVax and mNEXSPIKE, and Novavax-Sanofi's Nuvaxovid are approved for specific age groups and high-risk individuals. CDC recommendations from 2025-2026 remain in effect. Vaccines are available at pharmacies and healthcare centers, with coverage by insurers, Medicaid, and Medicare.