According tomedia BGR reported that curbing the new coronavirus is crucial to the re-opening of the economy, only a good testing and contact tracking policy, can reduce the infection rate. Knowing how contagious a person is for a long time is also a key detail for the authorities because they can better manage their resources. New data from Singapore shows that PATIENTS WITH COVID-19 ARE NO LONGER CONTAGIOUS AFTER 11 DAYS, EVEN IF THEIR PCR TEST RESULTS ARE STILL POSITIVE.
A new study by the National Centre for Infectious Diseases in Singapore and the Singapore Academy of Medical Sciences says the virus cannot be isolated or cultured after the 11th day of the disease. The researchers analyzed the parameters of 73 COVID-19 patients in the region and concluded: “Viral RNA testing may persist in some patients, and this ongoing RNA testing represents a non-infectious virus, which is non-infectious.” “
This new respiratory disease is relatively abnormal during recovery. Some people take weeks to get better, and many still test positive after their symptoms disappear, leaving them unable to be discharged from the hospital. These new studies may change the way hospitals manage PATIENTS with COVID-19.
The study follows similar studies in other countries, including Hong Kong, China, which showed that infected people were infected 2.3 days before symptoms appeared, peaking before symptoms appeared and dropping within seven days. Another study from Taiwan, China, looked at PATIENTS AND CONTACTS OF COVID-19 AND CONCLUDED THAT THE SECONDARY CASES THEY OBSERVED WERE THOSE INFECTED WITHIN 5 DAYS OF THE PATIENT’S SYMPTOMS. After that, none of the contacts were infected.
The Singapore paper also cites a study from Germany to support its findings. Researchers in Germany have found that patients are highly contagious during the first week of symptoms. “In the first week of symptoms, infectious viruses were cultured from throat and lung samples, and despite the high viral load detected by conventional PCR, none of the infected viruses were detected after the 8th day,” the researchers said. “
Active virus replication declines rapidly after the first week, and after the second week of onset, although PCR detection RNA persists, no viable virus has been found. These findings are supported by epidemiological, microbiological and clinical data. These new findings allow us to revise discharge criteria based on time process data for infectious diseases, rather than with out-of-detectRNA through PCR testing, taking into account clinical and public health perspectives, including the patient’s individual physical and mental health. In addition, taking into account these findings, resources can focus on more timely public health interventions and controls in patients with acute respiratory symptoms and suspected COVID-19 presentation.
The data could change the way hospitals implement discharge policies, which can be used to develop updated programs for people who are isolated at home for treatment of the disease.
The study also showed that cases of POSITIVE COVID-19 were not always contagious. Relevant research from Korea is mentioned in the paper. South Korea’s CDC and other authorities a few days ago brought us our long-awaited COVID-19 immunity good news. People who tested positive again for several days after healing did not re-infect the new coronavirus. This is not a relapse, nor is it a sign of no immunity. Instead, tests can detect residual viral substances that are not contagious. South Korea has actually changed its policy on this situation. Those who test positive again will not be quarantined, but health authorities will continue to monitor their condition.
The study did not address asymptomatic infections and their infectiousness. How contagious an asymptomatic infection is also unknown. But the report says asymptomatic patients may have similar patterns of virus shedding.