I would say your wife got lucky. There's no reason to think all of them are identical or now they are safe but they weren't before. It might only be certain batches which are the real jab that are randomly or deliberately shipped to locations based on where they want outbreaks to occur. It could be only a certain percent are placebo and its totally random who gets a real one or saline.

Its still a bioweapon and I still wouldn't take that chance.