So other questions would be does the CDC request or store records of individual covid spreading at all- let alone if the spread was from some combination of vax

So other questions would be does the CDC request or store records of individual covid spreading at all- let alone if the spread was from some combination of vaxed or unvaxed, or covid history? It seems like early on the US did not do contact tracing to any consistent level and probably does even less now. And the contact tracing didn’t necessarily confirm spread from anyone individually.