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. 2022 Mar 14;10(3):447. doi: 10.3390/vaccines10030447

Figure 3.

Figure 3

Comparison of serum levels of anti-SARS-CoV-2 IgG at (A) 12, 30, 60 and (B) 90, 120, 150, 180 days after the 2nd dose of vaccination (BNT162b2 mRNA). Healthcare workers were divided into four study groups: Group 1 = individuals without prior SARS-CoV-2 infection and with no adverse reaction after vaccination; Group 2 = individuals without prior SARS-CoV-2 infection and with at least one adverse reaction after vaccination; Group 3 = individuals with prior SARS-CoV-2 infection and with no adverse reaction after vaccination; Group 4 = those who had prior SARS-CoV-2 infection and at least one adverse reaction after vaccination. Sample size at each follow-up time point is shown in table below.