The credibility of the regulator’s commitment is critical
in the process. If this commitment is not perceived as
credible by manufacturers, it may not foster vaccine
innovation. However, as it takes approximately 10–12 years
to bring a vaccine to market, the regulator’s commitment
needs to be made when the development of the vaccine
actually starts. Finally, considering budget cuts, health
authorities may be reluctant to engage in large catch-up
campaigns once a vaccine is approved.