Very interesting hypothesis. Will it be proved wrong? We now know that the vaccine effectiveness fades very quickly that after 6 months the booster is required.

Very interesting hypothesis. Will it be proved wrong? We now know that the vaccine effectiveness fades very quickly that after 6 months the booster is required. But how AZ compares with Pfizer vaccine? It is possible that the studies that try to measure it, mostly measures breakthrough infections or hospitalizations but not severe disease status.