While the infection does not last more than 9 days in people with mild or no symptoms of the virus.
The review published in the journal Infection Control and Hospital Epidemiology.
A review of dozen of studies by researchers at Oregon Health and Science University and Oregon State University suggests that humans may shed viruses over long periods of time.
This is in line with the guidelines of the U.S. Centers for Disease Control and Prevention, which confirm recommendations for the duration of isolation of the following SARS-CoV-2 infection.
“The detection of viral RNA may not correlate with the infectivity, as the available data on virus culture indicate a shorter duration of the release of viable viruses,” the authors say. “Additional data is needed to determine the length of time viable viruses have been released and the impact on the risk of transmission.” The researchers decided to run the review to get more information about transmission and information about infection control, said co-author Monica Sikka. MD, Assistant Professor of Medicine (Infectious Diseases) at the OHSU School of Medicine.
“Although humans can shed viruses for a long time, the studies we examined showed that live viruses that could predict infectivity were only detected for up to nine days in people with mild symptoms,” said Sikka.
The researchers identified 77 studies worldwide, including 59 peer-reviewed studies, and combed the results. All studies reported evaluations of virus shedding using standard methods of identifying the virus through replication through a process called the polymerase chain reaction, or PCR.
“Although PCR positivity can be increased, culture data suggest that virus viability is typically shorter,” the authors added.
(This story was posted by a wire agency feed with no changes to the text.)
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