What I am saying is: 1) No one tried to check the suffiency response by attempting to reinfect the person, because that would grossly unethical; unless there wa

What I am saying is: 1) No one tried to check the suffiency response by attempting to reinfect the person, because that would grossly unethical; unless there was such attempt, we cannot say anything about the reponse, it even might have been cross-reaction from common cold antibodies 2) Even if there was the response, there was high chance of ADE. It does not matter was that immunity acquired through vaccination or natural infection; ADE does not pick and choose; weak immunity causes worse response than no immunity. Having said that, SARS-CoV-2 does not seem to produce ADE.