Clinical features, isolation, and complete genome sequence of severe acute respiratory syndrome coronavirus 2 from the first two patients in Vietnam.
Lan T PhanThuong Vu NguyenLoan K T HuynhManh H DaoTho A N VoNhung H P VuHang T T PhamHieu T NguyenThuc T NguyenHung Q LeThinh V NguyenQuan H NguyenThao P HuynhSang N NguyenAnh H NguyenNgoc T NguyenThao N T NguyenLong T NguyenQuang C LuongThang M CaoQuang Duy PhamPublished in: Journal of medical virology (2020)
In January 2020, we identified two severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-infected patients in a familial cluster with one person coming from Wuhan, China. The complete genome sequences of two SARS-CoV-2 strains isolated from these patients were identical and 99.98% similar to strains isolated in Wuhan. This is genetically suggestive of human-to-human transmission of SARS-CoV-2 and indicates Wuhan as the most plausible origin of the early outbreak in Vietnam. The younger patient had a mild upper respiratory illness and a brief viral shedding, whereas the elderly with multi-morbidity had pneumonia, prolonged viral shedding, and residual lung damage. The evidence of nonsynonymous substitutions in the ORF1ab region of the viral sequence warrants further studies.