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. 2021 May 7;70(18):680–684. doi: 10.15585/mmwr.mm7018e2

TABLE 3. V-safe enrollees who completed at least one survey and reported a local or systemic reaction or health impact on days 0–7 after receiving Janssen COVID-19 vaccine — United States, March 2–April 12, 2021.

Event Percentage of enrollees reporting reaction or health impact
Days 0–7* Day 0 Day 1 Day 2 Day 3 Day 4 Day 5 Day 6 Day 7
Total enrollees,
no. (%) of enrollees reporting
338,765 (100)
207,483 (61)
259,535 (77)
261,096 (77)
251,676 (74)
238,946 (71)
225,427 (67)
209,958 (62)
202,138 (60)
Reaction reported
Fatigue
59.1
17.9
56.3
26.2
16.7
12.8
11.0
9.8
9.0
Injection site pain
57.9
31.6
48.5
39.1
30.1
21.5
13.7
7.9
5.0
Headache
52.2
13.0
50.8
19.9
10.8
8.1
7.6
7.5
7.4
Myalgia
47.8
9.0
47.9
19.2
9.7
6.6
5.3
4.6
4.4
Fever
34.7
4.8
37.0
8.3
2.8
1.8
1.4
1.2
1.2
Chills
34.2
5.5
35.7
6.7
2.3
1.4
1.2
1.0
1.0
Joint pain
26.1
3.5
25.3
8.9
4.5
3.3
2.8
2.6
2.4
Nausea
18.7
3.8
15.7
5.4
3.5
2.6
2.1
1.9
1.7
Diarrhea
9.4
0.9
4.3
3.4
2.7
2.1
1.7
1.5
1.5
Swelling
9.3
1.8
4.6
4.6
4.4
3.9
2.9
2.1
1.5
Abdominal pain
7.4
0.9
5.0
2.2
1.6
1.3
1.2
1.1
1.1
Redness
7.4
1.2
2.5
4.0
4.1
3.4
2.4
1.6
1.0
Itching
7.1
1.2
1.8
2.6
3.2
3.0
2.5
1.8
1.4
Vomiting
2.1
0.2
1.6
0.4
0.2
0.2
0.2
0.2
0.2
Rash
1.9
0.2
0.5
0.6
0.6
0.6
0.6
0.6
0.6
Any injection site reaction§
60.7
33.1
50.3
41.8
33.1
24.1
15.9
9.7
6.6
Any systemic reaction
76.4
29.8
74.8
44.1
28.9
22.3
19.7
18.2
17.3
Any health impact**
33.9
4.8
33.2
9.7
5.1
3.8
3.3
3.1
3.1
Unable to perform normal daily activities
28.3
3.8
27.7
7.4
4.0
3.0
2.6
2.5
2.5
Unable to work
17.0
1.8
16.3
4.5
2.0
1.3
1.0
1.0
0.9
Needed medical care
1.4
0.1
0.4
0.2
0.3
0.3
0.3
0.4
0.4
   Telehealth
0.53
0.02
0.16
0.09
0.11
0.12
0.11
0.12
0.12
   Clinic
0.40
0.03
0.05
0.05
0.07
0.10
0.11
0.12
0.12
   Emergency visit
0.31
0.04
0.08
0.05
0.06
0.06
0.07
0.07
0.06
   Hospitalization 0.04 0.00 0.01 0.01 0.01 0.01 0.01 0.01 0.01

* Proportion of enrollees who reported a reaction or health impact at least once during postvaccination days 0–7.

Enrollees were able to respond on multiple days.

§ Injection site pain, swelling, redness, or itching.

Fatigue, headache, myalgia, fever, chills, nausea, diarrhea, abdominal pain, vomiting, or rash at injection site.

** A health impact was defined as being unable to perform normal daily activities, being unable to work, or receiving medical care.