The novel Coronavirus has infected more than 26 lakh people in India alone and there is no control over its spread as well. However, the Centres for Disease Control and Prevention (CDC) in the United States has now delivered some good news by claiming that there has been no case of a recovered patient having been re-infected with COVID-19 across the globe. While the recovered people can have low levels of the virus in their bodies for up to three months after they were first diagnosed, they cannot transmit the virus to other people. Albeit, they can test positive again within the three-month period due to its presence in the body.
“Reinfection with SARS-CoV2 (the virus responsible for the COVID-19 disease) has not yet been definitively confirmed in any recovered persons to date. If, and if so when, persons can be reinfected with the SARS-CoV2 remains unknown, and is a subject of investigation,” the CDC, which is part of the United States Department of Health, mentioned, as reported by the Indian Express.
Clearly, the latest assertion finally answers several questions related to people getting re-infected with the virus. Not to miss, the CDC has not said anything about the recovered patients developing immunity for three months. It has only pointed out that there has been no confirmed case of a re-infection during this time. Hence, the testing during this period is also “unnecessary” as it would be from the left-over traces of virus (“persistent shedding”) rather than a case of re-infection.
Additionally, the CDC has confirmed that persons with mild to moderate symptoms can be released from isolation 10 days after they first tested positive. For those with serious symptoms, they should be kept in isolation for a maximum of 20 days.be “Available data indicate that persons with mild to moderate Covid-19 remain infectious no longer than 10 days after symptom onset. Persons with more severe to critical illness or severe immunocompromise likely remain infectious no longer than 20 days after symptom onset,” it said.
“Recovered persons can continue to shed detectable SARS-CoV2 RNA in upper respiratory specimens for up to three months after illness onset, albeit at concentrations considerably lower than during illness, in ranges where replication-competent virus (those that can replicate and spread) has not been reliably recovered and infectiousness is unlikely. The etiology (cause of the disease) of this persistently detectable SARS-CoV2 RNA has yet to be determined,” it said.
For those caught unaware, the CDC’s new recommendations were based on more than 15 international and US-based published studies. “Researchers have found that the amount of live virus in the nose and throat drops significantly soon after the Covid-19 symptoms develop. Additionally, the duration of infectiousness in most people with Covid-19 is no longer than 10 days after symptoms begin, and no longer than 20 days in people with severe illness…,” it said.
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