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Volume 27, Number 1—January 2021
Research Letter

Superspreading Event of SARS-CoV-2 Infection at a Bar, Ho Chi Minh City, Vietnam

Nguyen Van Vinh Chau, Nguyen Thi Thu Hong, Nghiem My Ngoc, Tran Tan Thanh, Phan Nguyen Quoc Khanh, Lam Anh Nguyet, Le Nguyen Truc Nhu, Nguyen Thi Han Ny, Dinh Nguyen Huy Man, Vu Thi Ty Hang, Nguyen Thanh Phong, Nguyen Thi Hong Que, Pham Thi Tuyen, Tran Nguyen Hoang Tu, Tran Tinh Hien, Ngo Ngoc Quang Minh, Le Manh Hung, Nguyen Thanh Truong, Lam Minh Yen, H. Rogier van Doorn, Nguyen Thanh Dung, Guy Thwaites, Nguyen Tri Dung, Le Van TanComments to Author , and for the OUCRU COVID-19 research group1
Author affiliations: Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam (N.V.V. Chau, N.M. Ngoc, D.N.H. Man, N.T. Phong, N.T.H. Que, P.T. Tuyen, T.N.H. Tu, L.M. Hung, N.T. Truong, N.T. Dung); Oxford University Clinical Research Unit, Ho Chi Minh City (N.T.T. Hong, T.T. Thanh, P.N.Q. Khanh, L.A. Nguyet, L.N.T. Nhu, N.T.H. Ny, V.T.T. Hang, T.T. Hien, L.M. Yen, H.R. van Doorn, G. Thwaites, L.V. Tan); Children’s Hospital 1, Ho Chi Minh City (N.N.Q. Minh); Centre for Tropical Medicine and Global Health, Oxford, UK (H.R. van Doorn, G. Thwaites); Ho Chi Minh City Centre for Disease Control and Prevention Ho Chi Minh City (N.T. Dung)

Main Article

Table

History of travel and patients and contacts of patients positive for severe acute respiratory syndrome coronavirus 2 in cluster associated with bar, Ho Chi Minh City, Vietnam, 2020*

Patient no.
 Contact history and epidemiologic factors
 Inside bar?
 Travel history†
 Occupation
 Symptom onset
 Diagnosed
Patients present at bar X for celebration on March 14–15, 2020
1 Attended with patients 2, 3, and 4 Y Y Pilot 03/17 Mar 18
2 Attended with patients 1, 3, and 4; roommate of patient 3 UNK Y Teacher Unavail.‡ Mar 22
3 Attended with patients 1, 2, and 4; roommate of patient 2 UNK Y Teacher Unavail. Mar 22
4 Attended with patients 1, 2, and 3 UNK N Teacher Mar 21 Mar 22
5 Attendee; works at shoe company Y UNK N Unavail. Asympt. Mar 23
6 Waiter at bar X; in close contact with patient 1 Y N Bar X waiter Mar 16 Mar 23
7 Attendee UNK N Unavail. Unavail. Mar 24
8 Attendee; friend of patient 7 UNK N Teacher Unavail. Mar 24
9 Attendee UNK N Teacher Mar 25 Mar 26
10 Attendee UNK N Technician Asympt. Mar 26
11 Attended with patient 5 UNK N Unavail. Unavail. Mar 28
12 Attendee UNK N Unavail. Asympt. 04/02
13
 Attended with patient 12
 UNK
 N
 Unavail.
 Mar 26
 04/03
Contacts of patients present at bar X for celebration on March 14–15, 2020
14 Contact of patients 5 and 19 as coworkers at shoe company Y NA N Unavail. Asympt. Mar 25
15 Household contact of patient 10 NA N Unavail. Asympt. Apr 1
16 Household contact of patient 6 NA N Unavail. Unavail. Mar 27
17 Contact (driver) of patients 5 and 14 NA N Driver Mar 27 Mar 30
18 Household contact of patient 14; also contact of patient 5 as a coworker at shoe company Y NA N Unavail. Asympt. Mar 30
19 Contact of patients 5 and 14 as coworkers at shoe company Y NA N Unavail. Unavail. Apr 6

*Asympt., asymptomatic; NA, Not applicable; unavail., unavailable; UNK, unknown.
†Traveled to an area with known local transmission in previous 14 d.
‡Because patient did not enroll in the clinical study, but asymptomatic at time of diagnosis.

Main Article

1Members of the group are listed in the [[ANCHOR###SD1###Appendix###Anchor]].

Page created: October 05, 2020
Page updated: December 21, 2020
Page reviewed: December 21, 2020
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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