Fig. 1. Difference of onset time of adverse reactions after the first dose and the second SARS-CoV-2 vaccine (BNT162b2, Pfizer/BioNTech). Dose 1: Adverse event of the first dose Pfizer vaccination, Dose 2: Adverse event of the second dose Pfizer vaccination. Dose 1 onset time, n (%): none, 38 (27.3); within 15 minutes, 9 (6.5); 15 minutes to several hours later, 29 (20.9); several hours later–1 day, 53 (38.1); 1 day later, 10 (7.2). Dose 2 onset time, n (%): none, 21 (15.1); within 15 minutes, 5 (3.6); 15 minutes to several hours later, 32 (23.0); several hours later–1 day, 52 (37.4); 1 day later, 27 (19.4); 2 days later, 1 (0.7); 5 days later, 1 (0.7). P-value<0.001. P-value by Wilcoxon signed-rank test.
© KJFP
