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Pfizer based its production system on how the vaccine was developed in the laboratory, Calitri said. Normally engineers would spend years improving efficiencies and cost-effectiveness. That’s not what happened with COVID-19. Production is getting faster. For example, making the DNA that starts the vaccine process first took 16 days; soon it will take nine or 10. Though quality control and testing has accelerated, company officials say FDA regulations and best manufacturing practices are still being met.
