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Solicited local and systemic adverse reactions that occurred within 7 days after any dose in the safety population*
Incidence and severity of local and systemic adverse reactions in participants without a previous SARS-CoV-2 vaccination history (A) and in those with a SARS-CoV-2 vaccination history (B). All adverse reactions were graded according to the China National Medical Products Administration guidelines. *Participants who received at least one dose of vaccine or placebo.
