I can't even imagine the sort of stress the scientists and engineers who made the vaccines were under to get it out the door.

I would imagine that anyone on the team who raised too many concerns to anyone but the company higher-ups was quietly removed, and the ones who folllowed the 'appropriate channels' informed a room full of the company's executives, who then quizzed their lawyers and accountants to see how much money they could expect to be sued for/fined, and how much money they could expect to make.

"So we'll get fined a billion dollars 5 years from now, Who cares, we're gonna make 40 billion on this!"