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Approximately every second SARS-CoV-2 infection is without symptoms, Natural medicine & naturopathy specialist portal

45 percent of the SARS-CoV-2 infections are asymptomatic

Infection by the Coronavirus SARS-CoV-2 can be completely run without complaints, as several studies have already shown. How high this percentage is, it has been speculated only. A research team evaluated the data of over 40,000 COVID-19-Concerned. This showed that around 45 percent of all SARS-CoV-2 infections are without symptoms.

Researchers from the Scripps Research Institute substantiate the suspicion that a considerable part of the SARS-CoV-2 running to the infections are asymptomatic. The analysis included data from 16 groups of COVID-19-Concerned. The silent bearers could have a significant impact on the spread of the disease, or have had. The results were recently presented in the prestigious scientific journal “Annals of Internal Medicine”.

The silence spread

An exceptionally high percentage of people infected with the Virus SARS-CoV-2, show no symptoms of the disease COVID-19, the results of the current analysis. “The silent spread of the Virus makes it all the more difficult to keep it under control,” says Professor Eric Topol, Director of Scripps Research Institute.

Early spread by asymptomatic cases worn

The results suggest that asymptomatic infections may account for up to 45 percent of all COVID-19-cases, and a significant role in early and ongoing dissemination of COVID-19 play. The report underlines the need for extensive testing and contact tracing, to stem the pandemic.

In the prison of the asymptomatic proportion was 96 per cent

The analysis included data gathered from individuals from several countries and from different areas of life, including, for example, residents of nursing homes, cruise ship passengers, prison inmates, and various other groups. “What was practically common to all, was that a very large part of the Infected had no symptoms,” adds behavior researcher Daniel Oran. In some groups, the proportion of asymptomatic cases was significantly higher. “Among more than 3,000 inmates in four American States that have tested positive for the Coronavirus, the proportion was astronomically high,” says Oran. In this group, 96 percent of those Infected showed no symptoms.

Asymptomatic cases are the drivers of the disease?

The Review suggests further that asymptomatic individuals are able to transmit the Virus over a longer period of time, perhaps longer than 14 days. The viral loads in people with or without symptoms are very similar, but it remains unclear whether their infectiousness is of the same order of magnitude as in the case of persons who show symptoms. This issue had to be checked in a further study. (vb)

Also read: “silent” infections: blood-giving on Coronavirus antibodies tested.

Authors and source of information

This Text meets the requirements of the medical literature, medical guidelines, as well as current studies and was examined by doctors and Medical scientists.


Graduate editor (FH) Volker Blasek


  • The Scripps Research Institute: Up to 45 percent of SARS-CoV-2 infections may be asymptomatic, new analysis finds (published: 12.06.2020),
  • Daniel P. Oran, Eric J. Topol: Prevalence of Asymptomatic SARS-CoV-2 Infection; in: Annals of Internal Medicine, 2020,

Important Note:
This article contains only General information, and should not be used for self-diagnosis or treatment. It is not a substitute for a doctor’s visit.



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