Figure 2. Pooled Incidence of Immediate Severe Allergic Reactions to a Second SARS-CoV-2 mRNA Dose Among Persons Who Had an Immediate Allergic Reaction to Their First SARS-CoV-2 mRNA Vaccine Dose.

^aFor analysis purposes, this study by Krantz et al¹⁷ was combined with the 3 cases (all anaphylaxis) from Wolfson et al¹⁸ given that these 2 studies had overlap of cases.