Asymptomatic SARS-CoV-2 and transmission of infection.


Asymptomatic SARS-CoV-2 and transmission of infection. Study on the possibility that SARS-CoV-2 asymptomatics may transmit the infection was published in “Respir Med. 2020 May 13; 169: 106026. doi: 10.1016 / j.rmed.2020.106026. ” and clearly rendered to everyone on from which you can download the entire article for free.

A Study on Infectivity of Asymptomatic SARS-CoV-2 Carriers

Ming Gao 1Lihui Yang 2Xuefu Chen 3Yiyu Deng 4Shifang Yang 5Hanyi Xu 6Zixing Chen 7Xinglin Gao 8


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.

455 cases of asymptomatic are reported.

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.

Asymptomatic SARS-CoV-2 and transmission of infection.

They divided the cases into three groups: a group of 35 patients, a group of 196 members of the infected family and third group, 224 people from the hospital staff.

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.

In summary, all 455 contacts have been excluded from the SARS-CoV-2 infection and we conclude that the infectivity of some asymptomatic carriers of SARS-CoV-2 could be weak.

Keywords: Asymptomatic carrier; Contacts; Infectivity; SARS-CoV-2.


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