Why vaccine for covid 19 is difficult to prepareand taking so long
Answers
Developing a coronavirus vaccine has been accelerated across all stages – from testing to regulatory reviews and readying production – but will still take 12 to 18 months, say three infectious disease experts.Vaccine manufacturing plants must be pre-inspected and approved for sterile manufacturing conditions, quality controls, and production ramped up to support potentially billions of vaccine doses.
Public health policies and financing decisions for national public programmes need to be in place. Follow-up studies must be set up to closely monitor the vaccine’s long-term safety and effectiveness with large-scale immunisation.
This is even more important for an accelerated vaccine using new technology against a new virus.
For the COVID-19 pandemic, scientists, regulators, government and industry leaders have been working closely to accelerate coordination of the different requirements to run at parallel speed with some vaccine candidates which have already entered clinical trials.