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Seroprevalence of SARS‐CoV‐2 among high‐density communities and hyper‐endemicity of COVID‐19 in Vietnam

Tropical medicine & international health, 2022-05, Vol.27 (5), p.515-521 [Peer Reviewed Journal]

2022 John Wiley & Sons Ltd ;2022 John Wiley & Sons Ltd. ;ISSN: 1360-2276 ;EISSN: 1365-3156 ;DOI: 10.1111/tmi.13744 ;PMID: 35303386

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Title:
Seroprevalence of SARS‐CoV‐2 among high‐density communities and hyper‐endemicity of COVID‐19 in Vietnam
Author: Hoang, Van Thuan ; Pham, Thi Dung ; Nguyen, Quoc Tien ; Nguyen, Duy Cuong ; Nguyen, Duc Thanh ; Nguyen, Thanh Binh ; Tran, Thi Khanh Thu ; Phan, Trong Lan ; Vo, Phan Le Nguyen ; Dao, Thi Loi ; Fenollar, Florence ; Gautret, Philippe
Subjects: Adult ; Antibodies, Viral ; COVID-19 ; COVID-19 - diagnosis ; COVID-19 - epidemiology ; Epidemics ; high‐density communities ; Humans ; Immunoglobulin G ; Immunoglobulin M ; Infections ; Patients ; SARS-CoV-2 ; Seroepidemiologic Studies ; Serological tests ; Serology ; seroprevalence ; Severe acute respiratory syndrome ; Severe acute respiratory syndrome coronavirus 2 ; Vaccination ; Vietnam ; Vietnam - epidemiology ; Viral diseases
Is Part Of: Tropical medicine & international health, 2022-05, Vol.27 (5), p.515-521
Description: Objective To assess the magnitude of active and recovering COVID‐19 patients among at‐risk communities and to identify the factors associated with positive serology. Methods Four hundred and eighty‐three close contacts of COVID‐19 patients residing in Ho Chi Minh City, Vietnam, during the fourth wave of the COVID‐19 epidemic (September and October 2021) were included. Five weeks after exposure to a COVID‐19 patient, they underwent a serology test using the BIOSYNEX COVID‐19 BSS kit. Results The median age of participants was 37 years. A total of 34.6% individuals presented at least one clinical symptom between the time of contact with the COVID‐19 patient and inclusion in study. A total of 1.7% unvaccinated individuals tested positive for SARS‐CoV‐2 using real‐time PCR, and 9.5% had evidence of recent infection (positive PCR and/or IgM). A further 26.7% unvaccinated individuals presented evidence of a past infection (positive IgG only). Socio‐demographic characteristics, vaccination status and clinical symptoms were not associated with a positive IgM test. Conclusion This is the first serosurvey conducted during the fourth wave of the epidemic in Vietnam. It revealed a seropositivity rate higher than in previous studies and confirmed the hyperendemicity of SARS‐CoV‐2. Testing using rapid serological tests proved to be a reliable, easy‐to‐use method and enabled a rapid estimation of the burden of COVID‐19.
Publisher: England: Blackwell Publishing Ltd
Language: English
Identifier: ISSN: 1360-2276
EISSN: 1365-3156
DOI: 10.1111/tmi.13744
PMID: 35303386
Source: Geneva Foundation Free Medical Journals at publisher websites
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Seroprevalence of SARS‐CoV‐2 among high‐density communities and hyper‐endemicity of COVID‐19 in Vietnam

2022 John Wiley & Sons Ltd ;2022 John Wiley & Sons Ltd. ;ISSN: 1360-2276 ;EISSN: 1365-3156 ;DOI: 10.1111/tmi.13744 ;PMID: 35303386

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