I think you're conflated 'socialized' with 'nationalized'. The vaccine research and deployment was motivated by profit, but the US government was the one of the

I think you're conflated 'socialized' with 'nationalized'. The vaccine research and deployment was motivated by profit, but the US government was the one of the only customers. The beneficiaries were the citizens, based on need rather than their available excess capital. That sounds unlike normal US 'capitalist' healthcare, and very much like socialized healthcare.