Attack Rate for Wild-Type SARS-CoV-2 during Air Travel: Results from 46 Flights Traced by German Health Authorities, January–March and June–August 2020
Table 1
Characteristics of all contact persons included for the calculation of attack rates (n = 95), COVID-19 flight contact tracing study, Germany, 2020.
Jan–Mar 2020 (no mandatory masking, N = 391)
Jun–Aug 2020 (mandatory masking, N = 561)
value2
Total, N = 951
Age
47 (31, 57)
36 (21, 49)
0.013
37 (24, 54)
No data
5
6
11
Sex
0.8
Female
17 (44%)
19 (40%)
36 (42%)
Male
22 (56%)
28 (60%)
50 (58%)
No data
0
9
9
Developed symptoms after flight
5 (16%)
3 (6.7%)
0.3
8 (11%)
No data
8
11
19
Tested for SARS-CoV-2
12 (41%)
23 (59%)
0.2
35 (51%)
No data
10
17
27
Flight duration in minutes
140 (84, 245)
145 (112, 206)
>0.9
145 (100, 220)
Flight duration IATA categories
0.4
Short-haul (<3 hours)
21 (54%)
37 (66%)
58 (61%)
Medium-haul (3–6 hours)
13 (33%)
15 (27%)
28 (29%)
Long-haul (6–16 hours)
5 (13%)
4 (7.1%)
9 (9.5%)
Index case was symptomatic
31 (100%)
38 (86%)
0.039
69 (92%)
No data
8
12
20
Symptom onset of index case
0.8
Before flight
8 (26%)
8 (24%)
16 (25%)
On flight day
7 (23%)
10 (30%)
17 (27%)
After flight
16 (52%)
15 (45%)
31 (48%)
No data
8
23
31
No. of index persons per contact person
<0.001
1
31 (79%)
49 (88%)
80 (84%)
2
1 (2.6%)
3 (5.4%)
4 (4.2%)
4
0 (0%)
4 (7.1%)
4 (4.2%)
7
7 (18%)
0 (0%)
7 (7.4%)
Seating distance to index case
0.017
Direct seat neighbor
0 (0%)
5 (9.6%)
5 (5.8%)
Two rows
31 (91%)
47 (90%)
78 (91%)
Index case was cabin crew
3 (8.8%)
0 (0%)
3 (3.5%)
No data
5
4
9
No. of days from positive test of index to successful tracing
