Although it was just analogy, are you familiar with the Ford Pinto?

The Ford Pinto had a serious safety issue where rear-ending it would lock the doors and explode. They knew about the issue but did not recall it because the cost-benefit analysis told them not-recalling was the most profitable move

So, car manufacturers weren't exactly indemnified, but the costs of doing wrong continue not to be great enough to matter.

Late reply. Viewing comments, I realize my initial comment was a bit too snarky. I was not at all trying to shield the manufacturers from being held responsible for harm from a defective product. I was mostly concerned that people would use the situation to decry all vaccines, denying their benefit. To extend the analogy of the Ford Pinto, I didn't want someone to say that because Ford made a dangerous car, that all cars were bad, that Ford was trying to kill off American citizens, and that one should never ride in or drive a car.