I don’t think Phizer did anything to make the vaccine better, just more available. Their size makes it possible to do things at larger scale. Phizer has pretty much given up on doing any R&D and now just buys up smaller innovative companies. They extract out any patents and other IP they want, and move on. I work in pharma, and everyone I know who’s worked for them in the past has a story about how Pfizer came in, bought their facility, then shut the doors within a couple years. Definitely didn’t make the lives of all those workers better, who had to uproot their families and find new jobs elsewhere.