Vaccine development cycle

Vaccine research is long, complex and costly. Because a vaccine is a biological product made from living microorganisms, its development cycle is quite different from that of a pharmaceutical product:

  • Exploratory stage: to understand the disease, its epidemiological data and the right proteins (antigens) to use in preventing or treating the disease  

     
  • Pre-clinical stage: to assess antigen safety and select the best candidate vaccine 

     
  • Clinical development: from 10 (Phase I) to 1,000 people (Phase III) are involved in clinical trials and the first batches are produced (clinical batches and industrial batches for compliance)  

     
  • Regulatory approval: all the data collected through the preceding stages are submitted to the relevant health authorities for approval 

     
  • Manufacturing process: takes up to 22 months to produce a single batch of vaccine  
     

  • Quality control: approximately 70% of production time is dedicated to quality control