Covid-19 patients not infectious after 11 days: Singapore study

Elias Hubbard
May 25, 2020

However, the tests COVID-19 can be even positive, as they are able to detect only part of the genome of the virus, but cannot determine its capability of proliferation and level of viability. "Active viral replication drops quickly after the first week, and viable virus was not found after the second week of illness despite the persistence of PCR detection of RNA".

"Scientifically, I'm very confident that there is enough evidence that the person is no longer infectious after 11 days", NCID executive director Leo Yee Sin told Singaporean newspaper the Strait Times.

The findings can help hospitals on releasing COVID-19 patients and lead public testing policy, according to the study. The discharge criteria is now based on negative test results rather than infectiousness.

Singapore's strategy on managing Covid-19 patients is guided by the latest local and worldwide clinical scientific evidence, and the Ministry of Health will evaluate if the latest evidence can be incorporated into its patient clinical management plan, according to a report by the Straits Times.

Mentzer added that the overproduction of new blood vessels could mean that the lungs in a patient afflicted with COVID-19 are desperately trying to get more oxygen to oxygen-deprived tissue.

Should officials allow patients to be discharged based on time, more than 80 per cent could go home after 11 days of illness.

Dr Asok Kurup, an infectious disease expert at the Academy of Medicine, said much more is known about the virus today than in the weeks after the outbreak began.

"A major limitation of our study is that the sample was small; we studied only 7 patients among the more than 320,000 people who have died from Covid-19, and the autopsy data also represent static information", the study authors wrote.

The government has been actively screening pre-school staff as it prepares to reopen pre-schools from June 2.

Other reports by Click Lancashire

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