CureVac N.V. (Nasdaq: CVAC), a biopharmaceutical company developing a new class of transformative messenger ribonucleic acid (mRNA)-based drugs in clinical trials, today announced the publication of the first data from its pivotal Phase 2b/3 HERALD study of CVnCoV, its first-generation COVID-19 vaccine candidate, on The Lancet pre-print server. The HERALD trial enrolls approximately 40,000 subjects in 10 countries in Latin America and Europe in predefined age groups between 18 and 60 years and over 60 years. In the final analysis, COVID-19 cases were detected based on 15 different viral variants.
As previously announced, the data are based on 228 confirmed COVID-19 cases that occurred at least two weeks after the second vaccination. CVnCoV demonstrated 48% overall efficacy against COVID-19 disease of any severity, including single mild and non-respiratory symptoms. In participants in the 18- to 60-year age group, CVnCoV showed significant protective efficacy, with 53% efficacy against disease of any severity across all 15 identified viral variants; a 77% protective effect against moderate and severe disease was also calculated for this age group. In the same age group, CVnCoV also provided a 100% protective effect against hospitalization or death.
The company is in close contact with the European Medicines Agency (EMA) with the intention of seeking regulatory approval to make the vaccine available to the large population for which it has been shown to be highly protective. Comprehensive clinical data packages continue to be submitted to the EMA as part of the rolling regulatory process, which began in February 2021. Completion of data submission is expected towards the end of the third quarter. With the lack of effective vaccines still a challenge in many parts of the world, the COVID-19 vaccine candidate CVnCoV, which has been tested in clinical trials in a variant-dominated environment, has the potential to contribute to the fight against the coronavirus pandemic in an environment characterized by an increasing number of viral variants.