Pfizer Seeks Approval for Lyme Disease Vaccine Despite Trial Setback
Written by Emily J. Thompson, Senior Investment Analyst
Updated: Mar 23 2026
0mins
Source: CNBC
- Vaccine Development Update: Pfizer announced it will seek regulatory approval for its Lyme disease vaccine despite failing to meet statistical goals in late-stage trials; however, the vaccine demonstrated over a 70% reduction in infection rates, indicating its potential protective capability.
- Market Outlook Assessment: While Pfizer's partner Valneva estimates peak annual sales of $1 billion for the vaccine, Pfizer anticipates overall revenue of around $60 billion, with more than $5 billion coming from its COVID-19 vaccine, highlighting the competitive landscape in the vaccine market.
- Clinical Trial Challenges: In 2023, Pfizer and Valneva dropped about half of the participants due to quality concerns with a third-party clinical trial operator, reducing the trial size from approximately 18,000 to 9,400, which may impact the final efficacy assessment of the vaccine.
- Vaccine Policy Risks: Advancing a vaccine that technically failed a clinical trial under a stricter regulatory environment may pose risks for Pfizer and could serve as a litmus test for vaccine policy in the U.S.
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Analyst Views on GSK
Wall Street analysts forecast GSK stock price to fall
6 Analyst Rating
1 Buy
2 Hold
3 Sell
Moderate Sell
Current: 53.840
Low
20.15
Averages
38.72
High
55.60
Current: 53.840
Low
20.15
Averages
38.72
High
55.60
About GSK
GSK plc is a biopharma company. The Company’s segments include Commercial Operations and Research and Development. Its portfolio and pipeline are focused on developing medicines and vaccines in four core therapeutic areas, which are the areas of human health it focuses on to prevent and treat disease: respiratory, immunology and inflammation; oncology; human immunodeficiency virus (HIV), and infectious diseases. Its specialty medicines prevent and treat diseases, from HIV to respiratory diseases, immune-mediated conditions like lupus, and cancer. General medicines include inhaled medicines for asthma and COPD with antibiotics. Its portfolio also includes Efimosfermin, a fibroblast growth factor 21 (FGF21) analog therapeutic in clinical development. The Company also engaged in ozureprubart, a long-acting anti-immunoglobulin E (IgE) monoclonal antibody. It is in phase IIb clinical development for prophylactic protection against food allergens.
About the author
Emily J. Thompson
Emily J. Thompson, a Chartered Financial Analyst (CFA) with 12 years in investment research, graduated with honors from the Wharton School. Specializing in industrial and technology stocks, she provides in-depth analysis for Intellectia’s earnings and market brief reports.
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- Collaborative Development: GSK licensed bepirovirsen from Ionis Pharmaceuticals and collaborated on its development, showcasing the company's strategic partnerships in advancing innovative therapeutics.
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