Asymptomatic Transmission of COVID-19: An Intriguing Study

One of the reasons constantly given by the media and others to wear a mask is to “protect” others. After all, even if you’re not sick you could still transmit the illness to someone else! Think of others! Don’t be so selfish! Asymptomatic transmission of COVID-19 is not only possible but likely!

Do your part and know the facts about asymptomatic transmission!
Do your part and know the facts about asymptomatic transmission!

Of course, that’s never been supported by fact. Even the scare-mongers at the CDC admit that “The proportion of SARS-CoV-2 transmission due to asymptomatic or pre-symptomatic infection compared to symptomatic infection is unclear.”

Which leads me to this: in a recently published Chinese study called “A study on infectivity of asymptomatic SARS-CoV-2 carriers”, an asymptomatic individual was exposed to 455 individuals. Do you want to guess how many of those exposed individuals got sick? Zero. Zip. Zilch. Nada. While it’s just one study, it’s at least some evidence that asymptomatic transmission does not occur.

Here’s the report abstract and link to pubmed, if you would like to read it for yourself (bolding in conclusion below is mine):

Direct Link to Complete Study (pdf)

Abstract: Asymptomatic Transmission of COVID-19 Infected Individual

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.