d**e
发帖数: 1124 | 1 【 以下文字转载自 USANews 讨论区 】
发信人: dime (dime), 信区: USANews
标 题: 无证传播不足为患？
发信站: BBS 未名空间站 (Thu Jul 16 10:28:37 2020, 美东)
最新发表的。 might be weak不知道是什么英语。。。 LOL
https://pubmed.ncbi.nlm.nih.gov/32513410/
A study on infectivity of asymptomatic SARS-CoV-2 carriers
Ming Gao 1, Lihui Yang 2, Xuefu Chen 3, Yiyu Deng 4, Shifang Yang 5, Hanyi
Xu 6, Zixing Chen 7, Xinglin Gao 8
Affiliations expand
PMID: 32513410 PMCID: PMC7219423 DOI: 10.1016/j.rmed.2020.106026
Abstract
Background: An ongoing outbreak of coronavirus disease 2019 (COVID-19) has
spread around the world. It is debatable whether asymptomatic COVID-19 virus
carriers are contagious. We report here a case of the asymptomatic patient
and present clinical characteristics of 455 contacts, which aims to study
the infectivity of asymptomatic carriers.
Material and methods: 455 contacts who were exposed to the asymptomatic
COVID-19 virus carrier became the subjects of our research. They were
divided into three groups: 35 patients, 196 family members and 224 hospital
staffs. We extracted their epidemiological information, clinical records,
auxiliary examination results and therapeutic schedules.
Results: The median contact time for patients was four days and that for
family members was five days. Cardiovascular disease accounted for 25% among
original diseases of patients. Apart from hospital staffs, both patients
and family members were isolated medically. During the quarantine, seven
patients plus one family member appeared new respiratory symptoms, where
fever was the most common one. The blood counts in most contacts were within
a normal range. All CT images showed no sign of COVID-19 infection. No
severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections was
detected in 455 contacts by nucleic acid test.
Conclusion: In summary, all the 455 contacts were excluded from SARS-CoV-2
infection and we conclude that the infectivity of some asymptomatic SARS-CoV
-2 carriers might be weak.
Keywords: Asymptomatic carrier; Contacts; Infectivity; SARS-CoV-2.
Copyright © 2020 Elsevier Ltd. All rights reserved. |
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