It's a stay meaning they agree with the lower courts. It's not perma-blocked, as in it's now a law on the books that this cannot happen, but someone would have to mount a legal challenge against it. The court's remarks seem to indicate that it would be difficult for such a challenge to win. For all intents right now, it's not enforceable at a federal level against businesses that are not federal offices or federal contractors. This doesn't mean that private or public owned companies can't institute their own mandates, but personally I think that would open them up to lawsuits if someone could show that the injections harmed them, and when something hits a company in the pocketbook they (sometimes, not in the case of going woke) step back.