Table 3.

Thrombocytopenic events for second dose BNT162b2 vaccine.

Time-period post vaccination	Number of events	Number of person days	Incidence rate ratio (95% confidence interval)
Thrombocytopenia
Baseline	1873	929,459	1.0
Clearance	26	26,803	0.39 (0.27–0.59)
0–6 days	24	13,440	0.71 (0.47–1.07)
7–13 days	27	13,237	0.82 (0.56–1.20)
14–20 days	34	13,167	1.05 (0.74–1.48)
21–27 days	19	13,104	0.60 (0.38–0.94)
0–27 days	104	52,948	0.79 (0.64–0.98)
Idiopathic Thrombocytopenic purpura (ITP)
Baseline	144	79,188	1.0
Clearance	≤5	2142	0.34 (0.10–1.07)
0–6 days	≤5	1071	0.89 (0.32–2.46)
7–13 days	≤5	1066	1.57 (0.71–3.46)
14–20 days	≤5	1064	1.73 (0.87–3.77)
21–27 days	≤5	1064	1.75 (0.88–3.86)
0–27 days	15	4265	1.26 (0.68–2.82)