Table Adverse events with administration of the AZD1222 vaccine, stratified by age of clinical trial participants

Adverse events within 7 days of administration; study participants aged 18-64 years from COV001, COV002, and COV003 studies

Adverse event reported

Dose 1 (%)

Dose 2 (%)

Local erythema

2.6

1.1

Local swelling

2.9

0.9

Pain at injection site

60.3

34.4

Local pruritus

6.5

4.2

Fatigue

64.6

43.0

Headache

61.1

38.3

Chills

37.2

6.5

Nausea

23.9

9.7

Fever

11.6

0.7

Myalgia

52.3

25.6

Arthralgia

28.0

11.6

Adverse events within 7 days of administration; study participants aged ≥65 years from COV001, COV002, and COV003 studies

Adverse event reported

Dose 1 (%)

Dose 2 (%)

Local erythema

2.3

0.4

Local swelling

2.0

0.8

Pain at injection site

22.8

10.2

Local pruritus

3.5

2.3

Fatigue

40.9

27.0

Headache

31.8

19.9

Chills

10.8

2.0

Nausea

8.0

5.5

Fever

1.0

0.0

Myalgia

22.6

13.7

Arthralgia

13.0

7.4

Adapted from Lancet. 2021 Jan 9;397(10269):99-111. and Product Monograph: AstraZeneca COVID-19 Vaccine, ChAdOx1-S [recombinant].