This is good summary of the intellectual property situation for mRNA vaccine. The link was posted 2 weeks ago on the Twitter stream of Katalin Kariko, pioneer of mRNA vaccine technology and VP at BioNTech.

https://www.ipwatchdog.com/2021/04/11/mrna-ip-competitive-la...

https://www.ipwatchdog.com/2021/04/21/mrna-ip-competitive-la...

https://www.ipwatchdog.com/2021/04/30/mrna-patent-competitiv...