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Absence of SARS-CoV-2 antibodies in pre-pandemic plasma from children and adults in Vietnam.
Chau, Nguyen Van Vinh; Nhan, Le Nguyen Thanh; Nguyet, Lam Anh; Tu, Nguyen Thi Kha; Hong, Nguyen Thi Thu; Man, Dinh Nguyen Huy; Ty, Dinh Thi Bich; Nhu, Le Nguyen Truc; Yen, Lam Minh; Khanh, Truong Huu; Quy, Du Tuan; Minh, Ngo Ngoc Quang; Ny, Nguyen Thi Han; Anderson, Danielle; Wang, Lin-Fa; van Doorn, H Rogier; Hung, Nguyen Thanh; Thanh, Tran Tan; Thwaites, Guy; Tan, Le Van.
  • Chau NVV; Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam.
  • Nhan LNT; Children's Hospital 1, Ho Chi Minh City, Vietnam.
  • Nguyet LA; Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Tu NTK; Dong Thap Provincial Center for Disease Control, Dong Thap Province, Vietnam.
  • Hong NTT; Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Man DNH; Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam.
  • Ty DTB; Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam.
  • Nhu LNT; Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Yen LM; Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Khanh TH; Children's Hospital 1, Ho Chi Minh City, Vietnam.
  • Quy DT; Children's Hospital 1, Ho Chi Minh City, Vietnam.
  • Minh NNQ; Children's Hospital 1, Ho Chi Minh City, Vietnam.
  • Ny NTH; Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Anderson D; Duke-NUS Medical School, Singapore.
  • Wang LF; Duke-NUS Medical School, Singapore; SingHealth Duke-NUS Global Health Institute, Singapore.
  • van Doorn HR; Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam; Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK.
  • Hung NT; Children's Hospital 1, Ho Chi Minh City, Vietnam.
  • Thanh TT; Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam.
  • Thwaites G; Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam; Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK.
  • Tan LV; Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam. Electronic address: tanlv@oucru.org.
Int J Infect Dis ; 111: 127-129, 2021 Oct.
Article in English | MEDLINE | ID: covidwho-2113692
ABSTRACT
We tested pre-pandemic (2015--2019) plasma samples from 148 Vietnamese children and 100 Vietnamese adults at high risk of zoonotic infections for antibodies against SARS-CoV-2 nucleocapsid and spike proteins. None was positive. The data thus demonstrated no evidence of prior serological cross-reactivity with SARS-CoV-2 that might explain the low numbers of COVID-19 in Vietnam. No pre-existing cross-reactivity might explain Vietnam success of COVID-19 control.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: SARS-CoV-2 / COVID-19 Type of study: Observational study / Prognostic study / Randomized controlled trials Limits: Adult / Child / Humans Country/Region as subject: Asia Language: English Journal: Int J Infect Dis Journal subject: Communicable Diseases Year: 2021 Document Type: Article Affiliation country: J.ijid.2021.07.072

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Full text: Available Collection: International databases Database: MEDLINE Main subject: SARS-CoV-2 / COVID-19 Type of study: Observational study / Prognostic study / Randomized controlled trials Limits: Adult / Child / Humans Country/Region as subject: Asia Language: English Journal: Int J Infect Dis Journal subject: Communicable Diseases Year: 2021 Document Type: Article Affiliation country: J.ijid.2021.07.072