Cryonics Advancements

Cryonics has been proven!  
After WW3, there was nuclear winter...
Cryonics had a large jump where people choose to be frozen vs. living in the devastating times beyond the war.
At 2050, the first attempts to reanimate frozen humans were attempted..  The first attempts were not successful.  
A small stream of test candidates were thawed and eventually, SUCCESS! 
A reanimated human without drastic side effects or brain damage!!