RE: My understanding is that aborted baby tissue was used in research, development and/or testing
I watched the YouTube presentation of Dr. Mobeen Syed regarding Novavax. He says the Novavax DID NOT use any aborted baby tissues in research, development or testing.
In fact he presented 7 objections to the current approved vaccines by the vaccine hesitant and shows how Novavax would satisfy every single criteria presented by those who object, aborted fetal tissue being one of them.
I would encourage you to find time to watch this 50 minute presentation by Dr. Mobeen Syed where he dissects every single possible objections to the Novavax vaccine:
https://m.youtube.com/watch?v=Q00lyd3gyy4&t=339s