Given the unimaginable pace by which vaccine growth for COVID-19 is happening, it deserves considering again on the everyday growth and approval time of earlier vaccines. Puthumana et al. (2020) opinions 21 vaccines approvals since 2010. They discover that:
…most novel vaccines permitted by the FDA required about eight years of medical growth and have been based mostly on proof from a median of seven medical trials, together with not less than 2 pivotal efficacy trials that have been randomized, masked, and used a comparator group. These pivotal efficacy trials enrolled a median of 5000 sufferers, who have been adopted up for severe opposed occasions for not less than 6 months. Given the urgency of growing a COVID-19 vaccine, trials will should be bigger than these supporting prior vaccine approvals and embrace ample follow-up time for emergence of opposed results.
Bringing a COVID vaccine to market in 1-2 years can be a exceptional accomplishment given earlier vaccine growth timelines.