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‘Viral shedding’: What is it and when are people with COVID-19 most infectious? – Portland, Oregon

Portland, Oregon 2020-11-26 02:19:43 –

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Denver (NEXSTAR MEDIA WIRE / KDVR) – COVID-19 research is in its infancy and many researchers say it’s still unknown, but experts have learned a lot about the virus since March – Now, British researchers are new, and the data they say show when people are most contagious after catching COVID-19.

This study, by researchers at the University of St Andrews in Scotland, examined viral load and viral shedding data (which help determine infectivity), with these levels peaking from the time of initial symptoms to the fifth day after infection. I understand.

“When a person is infected with the virus, the virus can multiply in the body and be released into the environment by sneezing, coughing, and even speaking. This release is called” shedding, “and virus shedding is COVID. -19 is a way to spread from person to person, “writes Mayo Clinic.

Since the outbreak began, the exact length of time an infected individual will continue to release the virus remains unknown.

The St Andrews team, led by Dr. Muge Cevik, examined data from 98 studies of patients with three types of coronavirus, SARS-CoV-2, SARS-CoV, and MERS-CoV. 79 of the studies involved patients with SARS-CoV-2 or COVID-19, all of which required at least 5 participants, randomized controlled trials, and cohort studies.

Viral shedding of the other two coronaviruses, commonly known as SARS and Middle East respiratory syndrome, does not peak until one week after the onset of symptoms. This allows people to identify the infection and self-quarantine before unknowingly becoming infected. “This finding probably explains the efficient diffusion of SARS-CoV-2 compared to SARS-CoV and MERS-CoV,” the researchers said.

With COVID-19, some patients do not experience symptoms, while others are already shedding the virus at a high rate when symptoms begin to appear, so they unknowingly infect others with the virus. It will be easier.

Coronavirus can continue to be shed by people who have recovered for up to three months after the onset of the disease, according to a CDC study, but a new UK study found a live virus in patients in a much shorter period of time. It turned out that

“Our findings show that patients with SARS-CoV-2 infection may have prolonged RNA release for up to 83 days with upper respiratory tract infection, despite persistently high viral RNA loading. However, it suggests that the live virus was not isolated from the culture after the 9th day of symptoms, “the paper said.

The CDC states that the data available from the study show that people with mild to moderate COVID-19 symptoms become infectious 10 days after the onset of symptoms.

According to the CDC, people with severe to severe illness or severe immunodeficiency may remain infectious within 20 days of the onset of symptoms.

Upon recovery, the CDC will be able to continue to release detectable COVID-19 RNA from upper respiratory tract specimens for up to 3 months after the onset of the disease, even if COVID-19 levels are much lower than they really are. Stated. sick.

For those who have never had symptoms, the CDC states that quarantine and other precautions can be discontinued for 10 days.s After their first positive COVID-19 PCR test.

‘Viral shedding’: What is it and when are people with COVID-19 most infectious? Source link ‘Viral shedding’: What is it and when are people with COVID-19 most infectious?

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