Not exactly, first they're only indemnified for reactions to the vaccine, which can cover a fairly large amount of symptoms and reactions, but it in no way indemnifies them for failures in the manufacturing of these vaccines.
The indemnity had to be enacted because the profit margin on vaccine manufacture is extremely low, and as adverse reactions do happen, it would only take a few court cases to completely wipe any sort of economic reason for the company to manufacture said vaccines. It was decided that the common good presented by having vaccines more than outweighed the only buyer (the government) having to perform the manufacturing themselves. As it is, an extremely small tax is placed upon each and every dose of vaccine, to help settle vaccine reaction cases in a special tribunal.
All in all, a pretty poor example of socialize the costs, privatize the profits..