Delta is extinct. Delta itself and subsequent variants absolutely confer immunity for other variants. Reinfection has mostly happened through immune escape via

Delta is extinct. Delta itself and subsequent variants absolutely confer immunity for other variants. Reinfection has mostly happened through immune escape via variants. If this disease is going anywhere, it's not likely to be back to anything like Delta, as the mutations that have taken the disease down a radically different Omicron path have produced obscenely more infectious results.