Pfizer Inc. (NYSE: PFE) and BioNTech SE (Nasdaq: BNTX) today announced the start of a Phase 1/2 trial exploring the safety, tolerability, and immunogenicity of the companies’ mRNA vaccine candidates against shingles (also known as herpes zoster, or HZ), a debilitating disease caused by the varicella-zoster virus (VZV). Shingles affects millions of people around the world each year.2
The companies’ Phase 1/2 multicenter, randomized, controlled, dose-selection study (NCT05703607
will evaluate the safety, tolerability, and immunogenicity of mRNA vaccine candidates against shingles. The study is aiming to enroll up to 900 healthy volunteers 50 through 69 years of age and is being conducted in the United States. Phase 1 will help select the optimal mRNA vaccine candidate, dose level, dosing schedule, and formulation for advancement to Phase 2. Participants in the study will be followed to determine how long protection may last.
While there are currently approved vaccines for shingles, Pfizer and BioNTech aim to utilize mRNA technology to potentially develop a vaccine that demonstrates high efficacy, is well tolerated, and is efficient to produce globally. The companies will leverage Pfizer's proprietary antigen technology and BioNTech's proprietary mRNA platform technology used in the companies’ COVID-19 vaccine. The mRNA shingles vaccine candidates encode different versions of glycoprotein E (gE) on the surface of the varicella zoster virus. The gE protein is important for viral replication and the cell-to-cell spread after reactivation of the virus in the nerve cells.3
Pfizer and BioNTech announced a shingles vaccine collaboration in January 2022. The companies are also working together on COVID-19 vaccines, and a COVID-19 and influenza combination vaccine program.