Health
Why some patients continue to test positive for coronavirus
By the second day of hospitalization for Charles Pignal’s COVID-19, a 102 degree mild cough and fever had disappeared. With the boring “bounce off the wall” of his room in the isolated area of the National Center for Infectious Diseases Singapore, he felt he could go out and play tennis.
The shoe manager, 42, tells her mother over the phone:
However, Pignal will remain coronavirus-positive for another 5 weeks without any new symptoms. He was not released by the 40th day of his first illness.
Cases like him wonder why medical researchers around the world seem to see coronaviruses (usually lasting about 2-3 weeks in the body) long-lasting, even in relatively young and healthy patients. As I think, it is getting more and more attention.
Understanding how the virus leaves the body in a study showing that asymptomatic patients can be infected with the SARS-CoV-2 virus is starting to restart the economy for US and global governments Therefore, it is one of the most pressing mysteries that researchers face.
This marks a dangerous time in the evolution of the virus that killed more than 210,000 people. When the restrictions on daily life begin to be relaxed, a person who does not know that the virus is infected may inadvertently infect others. The recovered patient may infect the system with viruses in the weeks or months later.
Studies show that COVID-19 has an average recovery time of two weeks, with almost one month free of the virus in a month. “For unknown reasons, it’s less than 1% to 2%. Hsu Li Yang, Doctor specializing in infectious diseases at Saw Swee Hock School of Public Health at National University of Singapore.
In the last few weeks, China and South Korea reported that some patients who recovered from COVID-19 were repositive during follow-up visits. In an extreme case, a patient in Wuhan, China, whose epidemic began late last year, tested positive 70 days after recovery.
Doctors in both countries said they did not think the patient was reinfected. It can be of concern because of its impact on building widespread immunity to vaccine-free diseases. Nor was there any evidence that the patient had infected another person.
Korean doctors disregard the results and argue that standard genetic testing is designed to detect even small amounts of the virus and does not always distinguish between dead fragments of the virus and particles that are still infectious. Did. Patients diagnosed as cured may still have fragments of SARS-CoV-2 in their system.
“Many relapses in South Korea are likely to reflect this phenomenon,” Sue said.
Studies show that COVID-19 patients are most contagious at the onset of the disease with the highest viral load, but it remains to be seen whether those who have cleared the virus for several weeks remain contagious to the end.
Research from Hong Kong Viral nucleic acid was found in saliva of a patient whose symptoms appeared 25 days earlier. Ah Southern California Man People infected with the cruise ship Diamond Princess took 29 days to be examined, despite showing few symptoms.
“If these people can continue to get the virus, they could partly contribute to this pandemic,” said Roquesh Kumar Sharma, a lecturer at the Yale University School of Medicine.
To the study Of the 16 Beijing patients who had a mild infection last month, half of the patients continued to spread the virus after the fever, cough, and other symptoms disappeared. The authors of the study, which included Sharma, said the results reminded that recuperated patients should be treated “as carefully as symptomatic patients.”
This poses a challenge to the health system in the face of an increasing epidemic.
In Singapore, a pandemic among low-paying foreign workers has increased coronavirus infections from 1,000 in early April to over 15,000. City officials are fighting to expand temporary isolation facilities at hotels and convention centers to reserve hospital beds for more severe cases for milder patients.
As of Wednesday, at least 200 patients remained in hospitals or isolation centers more than a month after admission.
A Frenchman, who had symptoms when he flew from London to his home in Singapore in early March, asked a doctor about the 15th day of hospitalization to see if he was completely fit but was contagious. It was.
“He said we didn’t know, but there’s no evidence that what you lose is contagious,” Pignal said.
However, daily nasal swabs continued to show that the virus was in his system. The negative test on day 23 was canceled due to a positive result the next day.
He spent time reading and posting his videos Instagram account, He usually reviews books, but suddenly finds he is discussing with his illness and his confinement with thousands of new followers.
“I feel absolutely good,” he said in a message. “It’s just that the virus is still positive. I won’t go anywhere … I could be here for another day, another week, another two weeks-no one knows. It really It’s very annoying.
Later, because of the lack of beds in the quarantine room, considered low risk, Pignal was transferred to a hotel sharing a room with another infected person.
However, there were no doctors or nurses, tests were only done every four days, and Pignal began to get upset when he was in two months’ detention. The decoration of Sparta and the security guards roaming the site increased his sense of isolation.
“Frankly,” he said in a post on day 27, “I’m a little scared.”
Her fiancée edited a lip sync video featuring friends and family to cheer her up. He cultivated the “Karamasov Brothers”.
On April 11, the 39th day, he was said to have had a negative test and had a second test to confirm the results. The next morning, Relief was again negative. He was not infected by the virus and was sent home.
After three weeks he is in good health.
Source-> https://www.latimes.com/world-nation/story/2020-04-30/why-some-patients-keep-testing-positive-for-the-coronavirus
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