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Table 2 Reported adverse events Post-Pfizer vaccine First and Second dose (N = 1027)

From: Side effects of Pfizer/BioNTech (BNT162b2) COVID-19 vaccine reported by the Birzeit University community

Adverse event

Reported after 1st dose

Reported after 2nd dose

P- value

Yes

No

No symptoms

Yes

216 (21.0)

133 (13.0)

0.853

No

129 (12.6)

549 (53.5)

Local adverse events

 Pain or swelling at the injection site

Yes

232 (22.6)

84 (8.2)

0.068

No

61 (5.9)

650 (63.3)

 Swollen armpit glands

Yes

11 (1.1)

11 (1.1)

0.441

No

41.6 (1.6)

989 (96.3)

Systemic adverse events

 Fever

Yes

214 (20.8)

150 (14.6)

0.498

No

163 (15.9)

500 (48.7)

 Chills

Yes

154 (15.0)

101 (9.8)

0.005

No

146 (14.2)

626 (61.0)

 Headache

Yes

245 (23.9)

136 (13.2)

0.221

No

158 (15.4)

488 (47.5)

 Increase in blood pressure

Yes

11 (1.1)

18 (1.8)

0.185

No

28 (2.7)

970 (94.4)

 Increase in heart rate

Yes

29 (2.8)

50 (4.9)

0.769

No

54 (5.3)

894 (87.0)

 Shortness of breath

Yes

37 (3.6)

55 (5.4)

0.463

No

64 (6.2)

871 (84.8)

 Persistent Cough

Yes

34 (3.3)

44 (4.3)

0.475

No

52 (5.1)

897 (87.3)

 Chest pain

Yes

36 (3.5)

37 (3.6)

0.016

No

62 (6.0)

892 (86.9)

 Voice hoarseness

Yes

19 (1.9)

38 (3.7)

1.000

No

37 (3.6)

933 (90.8)

 Dizziness

Yes

98 (9.5)

71 (6.9)

0.023

No

102 (9.9)

756 (73.6)

 Ringing in the ears (Tinnitus)

Yes

30 (2.9)

28 (2.7)

0.017

No

50 (4.9)

919 (89.5)

 Nausea

Yes

53 (5.2)

36 (3.5)

0.073

No

54 (5.3)

884 (86.1)

 Vomiting

Yes

9 (0.9)

17 (1.7)

0.061

No

31 (3.0)

970 (94.4)

 Diarrhea

Yes

25 (2.4)

21 (2.0)

0.263

No

30 (2.9)

951 (92.6)

 Abdominal pain

Yes

41 (4.0)

27 (2.6)

0.091

No

42 (4.1)

917 (89.3)

 Tiredness and fatigue

Yes

254 (24.7)

82 (8.0)

0.002

No

128 (12.5)

563 (54.8)

 Muscle pain (myalgia)

Yes

191 (18.6)

105 (10.2)

0.734

No

111 (10.8)

620 (60.4)

 Joint pain

Yes

148 (14.4)

70 (6.8)

0.012

No

104 (10.1)

705 (68.6)

 Swollen ankles and feet

Yes

4 (0.4)

11 (1.1)

1.000

No

11 (1.1)

1001 (97.5)

 Sleep disturbances

Yes

49 (4.8)

20 (1.9)

0.010

No

41 (4.0)

917 (89.3)

 Menstrual cycle changes

Yes

60 (8.6)

20 (2.9)

 < 0.001

No

66 (9.5)

548 (79.0)

  1. *McNemar’s test