Dose 1 vs. Dose 2

Overall, study participants reported harsher side effects with the second dose of the Pfizer/BioNTech vaccine and the Moderna vaccine.

Dose 1: Pfizer/BioNTech

Dose 2: Pfizer/BioNTech

Dose 1: Moderna

Dose 2: Moderna

Pain at the injection site

83%

78%

87%

90%

Fever

16%

17%

Fatigue

47%

59%

39%

68%

Headache

42%

52%

35%

63%

Chills

14%

35%

48%

Nausea/vomiting

21%

Muscle pain

21%

37%

24%

61%

Joint pain

11%

22%

17%

45%