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Immunogenicity of Oxford-AstraZeneca COVID-19 vaccine in Vietnamese healthcare workers
Nguyen Van Vinh Chau; Lam Anh Nguyet; Nguyen Thanh Truong; Le Mau Toan; Nguyen Thanh Dung; Le Manh Hung; Mai Thanh Nhan; Dinh Nguyen Huy Man; Nghiem My Ngoc; Huynh Phuong Thao; Tran Nguyen Hoang Tu; Huynh Kim Mai; Do Thai Hung; Nguyen Thi Han Ny; Le Kim Thanh; Nguyen To Anh; Nguyen Thi Thu Hong; Le Nguyen Truc Nhu; Lam Minh Yen; Marc Choisy; Tran Tan Thanh; Guy Thwaites; Le Van Tan.
Afiliación
  • Nguyen Van Vinh Chau; Hospital for Tropical Diseases
  • Lam Anh Nguyet; OUCRU
  • Nguyen Thanh Truong; HTD
  • Le Mau Toan; HTD
  • Nguyen Thanh Dung; HTD
  • Le Manh Hung; HTD
  • Mai Thanh Nhan; HTD
  • Dinh Nguyen Huy Man; HTD
  • Nghiem My Ngoc; HTD
  • Huynh Phuong Thao; HTD
  • Tran Nguyen Hoang Tu; HTD
  • Huynh Kim Mai; IP, Nha Trang
  • Do Thai Hung; IP, Nha Trang
  • Nguyen Thi Han Ny; OUCRU
  • Le Kim Thanh; OUCRU
  • Nguyen To Anh; OUCRU
  • Nguyen Thi Thu Hong; OUCRU
  • Le Nguyen Truc Nhu; OUCRU
  • Lam Minh Yen; OUCRU
  • Marc Choisy; OUCRU
  • Tran Tan Thanh; OUCRU
  • Guy Thwaites; OUCRU
  • Le Van Tan; OUCRU
Preprint en En | PREPRINT-MEDRXIV | ID: ppmedrxiv-21260162
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ABSTRACT
We studied the immunogenicity of Oxford-AstraZeneca vaccine in Vietnamese healthcare workers. We collected blood samples before each dose, at 14 days after each dose, and month 1 and 3 after dose 1 from each participant alongside demographics data. We measured neutralizing antibodies using a surrogate virus neutralization assay. The 554 study participants (136 males and 418 females) were aged between 22-71 years (median 36 years). 104 and 94 out of 144 selected participants were successfully followed up at 14 days after dose 2 and 3 months after dose 1, respectively. Neutralizing antibodies increased after each dose, with the sero-conversion rate reaching 98.1% (102/104) at 14 days after dose 2. At month 3 after dose 1, neutralizing antibody levels decreased, while 94.7% (89/94) of the study participants remained seropositive. Oxford-AstraZeneca COVID-19 vaccine is immunogenic in Vietnamese healthcare workers. The requirement for a third dose warrants further research.
Licencia
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Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-MEDRXIV Tipo de estudio: Experimental_studies Idioma: En Año: 2021 Tipo del documento: Preprint
Texto completo: 1 Colección: 09-preprints Base de datos: PREPRINT-MEDRXIV Tipo de estudio: Experimental_studies Idioma: En Año: 2021 Tipo del documento: Preprint