| Abdelmoniem et al22
|
Egypt |
Cross-sectional |
January 2020 |
Health care workers or in-hospital patients |
203 |
29 |
29 |
Low |
| Abeysuriya et al23
|
UK |
Cross-sectional |
September 2020 |
Pregnant women |
180 |
7 |
6 |
Low |
| Akbarialiabad et al24
|
Iran |
Cross-sectional |
September 2020 |
Health care workers or in-hospital patients |
1805 |
86 |
19 |
Low |
| Al-Qahtani et al25
|
Kingdom of Bahrain |
Cohort |
November 2020 |
Air or cruise travelers |
2714 |
188 |
116 |
High |
| Al-Shamsi et al26
|
United Arab Emirates |
Cohort |
November 2020 |
Health care workers or in-hospital patients |
109 |
32 |
6 |
Low |
| Arnold et al27
|
US |
Cross-sectional |
January 2021 |
Health care workers or/in-hospital patients |
2882 |
103 |
38 |
Moderate |
| Arons et al12
|
US |
Cross-sectional |
April 2020 |
Nursing home residents or staff |
76 |
48 |
27 |
Moderate |
| Aslam et al28
|
US |
Cohort |
January 2020 |
Health care workers or in-hospital patients |
11 622 |
69 |
42 |
Low |
| Bayle et al29
|
France |
Cross-sectional |
January 2021 |
Nursing home residents or staff |
241 |
32 |
24 |
Moderate |
| Bender et al30
|
US |
Cohort |
September 2020 |
Pregnant women |
318 |
8 |
8 |
Moderate |
| Bianco et al31
|
US |
Cross-sectional |
May 2020 |
Pregnant women |
155 |
24 |
24 |
Low |
| Blain et al32
|
US |
Case series |
July 2020 |
Nursing home residents or staff |
113 |
44 |
8 |
Moderate |
| Blitz et al33
|
US |
Cohort |
August 2020 |
Pregnant women |
382 |
71 |
45 |
Low |
| Blumberg et al34
|
US |
Cohort |
October 2020 |
Health care workers or in-hospital patients |
1198 |
7 |
6 |
Low |
| Bosworth et al35
|
UK |
Cross-sectional |
July 2020 |
Health care workers or in-hospital patients |
1282 |
53 |
16 |
Moderate |
| Cao et al36
|
China |
Cross-sectional |
November 2020 |
Community residents |
9 865 404 |
300 |
300 |
High |
| Carroll et al37
|
Ireland |
Cohort |
October 2020 |
Close contact |
4586 |
310 |
209 |
Moderate |
| Cattelan et al38
|
Italy |
Cohort |
August 2020 |
Health care workers or in-hospital patients |
7595 |
395 |
109 |
Low |
| Cloutier et al39
|
Canada |
Cross-sectional |
August 2020 |
Community residents |
330 |
6 |
6 |
Low |
| Corcorran et al40
|
US |
Cohort |
August 2020 |
Health care workers or in-hospital patients |
25 |
10 |
4 |
Low |
| Deng et al41
|
China |
Case series on transmission |
October 2020 |
Close contact |
347 |
27 |
1 |
High |
| Dora et al42
|
US |
Cross-sectional |
May 2020 |
Nursing home residents or staff |
235 |
27 |
18 |
Low |
| Duan et al43
|
China |
Cross-sectional |
September 2020 |
Health care workers or/in-hospital patients |
4729 |
4 |
4 |
Moderate |
| Figueiredo et al44
|
Portugal |
Cohort |
October 2020 |
Pregnant women |
184 |
11 |
9 |
Low |
| Goldfarb et al45
|
US |
Cross-sectional |
May 2020 |
Pregnant women |
757 |
20 |
9 |
Moderate |
| Graham et al46
|
UK |
Cross-sectional |
September 2020 |
Nursing home residents or staff |
464 |
129 |
54 |
Moderate |
| Grechukhina et al47
|
US |
Cohort |
November 2020 |
Pregnant women |
1567 |
141 |
44 |
High |
| Gruskay et al48
|
US |
Cohort |
June 2020 |
Health care workers or in-hospital patients |
99 |
12 |
7 |
Low |
| Han et al49
|
China |
Cross-sectional |
June 2020 |
Community residents |
29 299 |
18 |
18 |
Low |
| Harada et al50
|
Japan |
Cohort |
December 2020 |
Health care workers or in-hospital patients |
1259 |
79 |
33 |
Low |
| Hcini et al51
|
France |
Cohort |
February 2020 |
Pregnant women |
507 |
137 |
103 |
Low |
| Hoxha et al52
|
Belgium |
Cross-sectional |
July 2020 |
Nursing home residents or staff |
280 427 |
8325 |
6244 |
Moderate |
| Hung et al53
|
China |
Case series |
September 2020 |
Air or cruise travelers |
215 |
9 |
6 |
High |
| Ibrahim et al54
|
Indonesia |
Case series |
August 2020 |
Health care workers or in-hospital patients |
4617 |
582 |
55 |
Low |
| Kennelly et al55
|
Ireland |
Cohort |
September 2020 |
Nursing home residents or staff |
2968 |
1105 |
290 |
Low |
| Kessler et al56
|
Germany |
Cross-sectional |
December 2020 |
Health care workers or in-hospital patients |
689 |
1 |
1 |
Moderate |
| Kimball et al57
|
US |
Cross-sectional |
April 2020 |
Nursing home residents or staff |
76 |
23 |
13 |
Moderate |
| Kirshblum et al58
|
US |
Cohort |
July 2020 |
Health care workers or in-hospital patients |
103 |
12 |
12 |
Low |
| Krüger et al59
|
Germany |
Cohort |
January 2021 |
Health care workers or in-hospital patients |
6940 |
27 |
7 |
Low |
| Kwon et al60
|
South Korea |
Cross-sectional |
July 2020 |
Health care workers or in-hospital patients |
2087 |
42 |
6 |
Low |
| LaCourse et al61
|
US |
Cohort |
May 2020 |
Pregnant women |
230 |
13 |
1 |
Low |
| Ladhani et al62
|
UK |
Cohort |
September 2020 |
Nursing home residents or staff |
518 |
158 |
97 |
High |
| Lan et al63
|
US |
Cross-sectional |
November 2020 |
Community residents |
104 |
21 |
16 |
Moderate |
| Lavezzo et al64
|
Italy |
Cross-sectional |
July 2020 |
Community residents |
2812 |
73 |
29 |
Moderate |
| Livingston et al65
|
UK |
Cohort |
October 2020 |
Health care workers or in-hospital patients |
344 |
131 |
16 |
Moderate |
| Lombardi et al66
|
Italy |
Cohort |
June 2020 |
Health care workers or in-hospital patients |
1573 |
139 |
28 |
Low |
| Ly et al67
|
France |
Cross-sectional |
November 2020 |
Nursing home residents or staff |
1691 |
226 |
46 |
Moderate |
| Lytras et al68
|
Greece |
Cross-sectional |
April 2020 |
Air or cruise travelers |
783 |
40 |
35 |
Low |
| Maechler et al69
|
Germany |
Cross-sectional |
December 2020 |
Community residents |
4333 |
333 |
14 |
High |
| Marossy et al70
|
UK |
Cross-sectional |
September 2020 |
Nursing home residents or staff |
2455 |
160 |
115 |
Moderate |
| Marschner et al71
|
Germany |
Cross-sectional |
July 2020 |
Health care workers or in-hospital patients |
139 |
1 |
1 |
Low |
| Martinez-Fierro et al72
|
Mexico |
Cross-sectional |
October 2020 |
Close contact |
81 |
34 |
5 |
Low |
| Massarotti et al73
|
Italy |
Cross-sectional |
August 2020 |
Pregnant women |
333 |
7 |
6 |
Low |
| Mattar et al74
|
Caribbean |
Cross-sectional |
December 2020 |
Close contact |
686 |
35 |
18 |
Low |
| Menting et al75
|
Germany |
Cross-sectional |
January 2020 |
Health care workers or in-hospital patients |
1185 |
11 |
2 |
Low |
| Migueres et al76
|
France |
Cross-sectional |
September 2020 |
Health care workers or in-hospital patients |
123 |
44 |
17 |
Low |
| Milani et al77
|
Italy |
Cross-sectional |
June 2020 |
Community residents |
197 |
21 |
21 |
Moderate |
| Nishiura et al78
|
Japan |
Cross-sectional |
May 2020 |
Air or cruise travelers |
565 |
13 |
4 |
Low |
| Ochiai et al79
|
Japan |
Cross-sectional |
June 2020 |
Pregnant women |
52 |
2 |
2 |
Low |
| Olalla et al80
|
Spain |
Cross-sectional |
August 2020 |
Health care workers or in-hospital patients |
498 |
2 |
2 |
Low |
| Olmos et al81
|
Chile |
Cross-sectional |
January 2021 |
Health care workers or in-hospital patients |
413 |
14 |
14 |
Low |
| Park et al82
|
South Korea |
Cross-sectional |
April 2020 |
Community residents |
1143 |
97 |
8 |
High |
| Park et al83
|
Korea |
Cohort |
December 2020 |
Air or cruise travelers |
39 |
30 |
4 |
Low |
| Patel et al84
|
United States |
Cohort |
June 2020 |
Nursing home residents or staff |
126 |
35 |
14 |
Low |
| Pavli et al85
|
Greece |
Case series on transmission |
September 2020 |
Air or cruise travelers |
891 |
5 |
2 |
High |
| Petersen et al86
|
United Kingdom |
Cross-sectional |
October 2020 |
Community residents |
36 061 |
115 |
88 |
Moderate |
| Puckett et al87
|
United States |
Cohort |
December 2020 |
Health care workers or in-hospital patients |
227 |
2 |
2 |
Low |
| Ralli et al88
|
Italy |
Cohort |
December 2020 |
Community residents |
298 |
12 |
9 |
Low |
| Rashid-Abdi et al89
|
Sweden |
Cohort |
November 2020 |
Health care workers or in-hospital patients |
131 |
21 |
1 |
Low |
| Ren et al90
|
China |
Cohort |
February 2021 |
Air or cruise travelers |
19 398 384 |
3103 |
1749 |
High |
| Rincón et al91
|
Spain |
Cohort |
September 2020 |
Health care workers or in-hospital patients |
192 |
36 |
14 |
Low |
| Roxby et al92
|
United States |
Cohort |
May 2020 |
Nursing home residents or staff |
80 |
3 |
2 |
Low |
| Sacco et al93
|
France |
Cohort |
November 2020 |
Nursing home residents or staff |
179 |
63 |
12 |
Low |
| Santos et al94
|
Portugal |
Cross-sectional |
December 2020 |
Health care workers or in-hospital patients |
8037 |
211 |
47 |
Low |
| Scheier et al95
|
Switzerland |
Cross-sectional |
February 2021 |
Health care workers or in-hospital patients |
2807 |
68 |
8 |
High |
| Shah et al96
|
US |
Case series |
July 2020 |
Health care workers or in-hospital patients |
625 |
1 |
1 |
Low |
| Shi et al97
|
US |
Cohort |
October 2020 |
Nursing home residents or staff |
389 |
146 |
66 |
Moderate |
| Singer et al98
|
US |
Case series |
October 2020 |
Health care workers or in-hospital patients |
4751 |
18 |
10 |
High |
| Tang et al99
|
China |
Cross-sectional |
July 2020 |
Health care workers or in-hospital patients |
1027 |
52 |
13 |
High |
| Tang et al100
|
US |
Cohort |
November 2020 |
Nursing home residents or staff |
1970 |
752 |
424 |
High |
| Temkin et al101
|
Israel |
Cross-sectional |
October 2020 |
Health care workers or in-hospital patients |
522 |
1 |
1 |
Low |
| Trahan et al102
|
Canada |
Cohort |
November 2020 |
Pregnant women |
803 |
41 |
11 |
Low |
| Tsou et al103
|
China |
Case series |
November 2020 |
Community residents |
17 935 |
100 |
10 |
Moderate |
| van Buul et al104
|
The Netherlands |
Cohort |
Decem ber 2020 |
Nursing home residents or staff |
839 |
25 |
6 |
High |
| Varnell et al105
|
US |
Cohort |
January 2021 |
Health care workers or in-hospital patients |
281 |
24 |
9 |
Moderate |
| Wadhwa et al106
|
US |
Cohort |
December 2020 |
Community residents |
172 |
19 |
12 |
Moderate |
| Wi et al107
|
South Korea |
Case series |
July 2020 |
Community residents |
17 400 |
111 |
25 |
High |
| Wood et al108
|
Indiana |
Cross-sectional |
August 2020 |
Community residents |
511 |
1 |
1 |
Low |
| Yamahata et al109
|
Japan |
Cross-sectional |
May 2020 |
Air or cruise travelers |
3711 |
696 |
410 |
Moderate |
| Yassa et al110
|
Turkey |
Cohort |
July 2020 |
Pregnant women |
296 |
23 |
12 |
Low |
| Yau et al111
|
Canada |
Cohort |
July 2020 |
Health care workers or in-hospital patients |
330 |
22 |
12 |
Low |
| Yousaf et al112
|
US |
Cohort |
July 2020 |
Close contact |
195 |
47 |
6 |
Low |
| Zhang et al113
|
China |
Case series on transmission |
April 2020 |
Close contact |
8437 |
25 |
3 |
High |
| Zhang et al114
|
China |
Cohort |
September 2020 |
Health care workers or in-hospital patients |
8553 |
235 |
21 |
Low |
| Zhao et al115
|
China |
Cohort |
August 2020 |
Health care workers or in-hospital patients |
1060 |
160 |
38 |
Low |
