Health
What is it, and when are people with COVID-19 most infectious?
Denver (NEXSTAR MEDIA WIRE /KDVR) – The study of COVID-19 is in its infancy and many researchers say it is still unknown, but experts have learned a lot about the virus since March. Currently, British researchers are most contagious after people catch COVID-19.
The· SurveyAccording to researchers at the University of St Andrews, Scotland, viral load and viral shedding data (which help determine infectivity) show that these levels peak from the time of initial symptoms to the fifth day after infection. understood.
“When a person is infected with a 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. ” 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.
by Study from CDCThe coronavirus can continue to be released from people who have recovered for up to three months after the onset of illness, but a new UK study found that the live virus was found in patients in a much shorter period of time. ..
“Our findings suggest that patients with SARS-CoV-2 infection may have prolonged RNA release for up to 83 days with upper respiratory tract infection, but also with persistently high viral RNA loading. Nonetheless, it suggests that live virus was not isolated from the culture after day 9 of the symptom. “
CDC says that Data available from the study show that people with mild to moderate COVID-19 symptoms become infectious 10 days after the onset of symptoms.
People with more severe to severe illness, or people with severe immunodeficiency, may remain infectious within 20 days of the onset of symptoms. According to the CDC..
Once recovered CDC says Even if COVID-19 levels are much lower than they were in the actual illness, they can continue to release detectable COVID-19 RNA from upper respiratory tract specimens for up to 3 months after the onset of the illness.
When it comes to people who have no symptoms CDC says Quarantine and other precautions can be stopped for 10 dayss After their first positive COVID-19 PCR test.
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