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  1. How are vaccines developed? - World Health Organization

  2. Vaccine Development – 101 - FDA

  3. A guide to vaccinology: from basic principles to new developments - Nature

  4. How Are Vaccines Made? Process of Developing Vaccines - Pfizer

  5. COVID-19 Vaccine Development: Behind the Scenes - NIH COVID …

  6. Vaccine Research & Development - Johns Hopkins Coronavirus …

  7. Vaccine Innovations - Past and Future | New England Journal of …

  8. Accelerated COVID-19 vaccine development: milestones, lessons

  9. Advances in Vaccine Development - PMC - National Center for ...

  10. The Journey of a Vaccine - NIH COVID-19 Research