https://www.statnews.com/2020/11/10/the-story-of-mrna-how-a-...
WSJ also has a number of good articles:
https://www.wsj.com/articles/how-pfizer-delivered-a-covid-va...
https://www.wsj.com/articles/how-a-couples-quest-to-cure-can...
https://www.wsj.com/articles/how-pfizer-partner-biontech-bec...
What I found quite interesting was the latest news release from BioNtech where they thank all their partners. Some parts of the supply chain are only served by very small companies.
https://investors.biontech.de/news-releases/news-release-det...