A majority of uninfected adults show preexisting antibody reactivity against SARS-CoV-2
People who have already had the virus are already naturally
immune. A Canadian study shows the majority of unaffected
adults have natural immunity to SARS-coV-2.
Therefore, the vaccine risk outweighs the potential
benefit for these people as they will gain no immunity from
the vaccine but will potentially be at risk of adverse reaction.