- The researchers conducted a review of 77 studies worldwide
- More data is needed to determine implications for risk post COVID: Experts
- People must remain in isolation for some days even post recovery: Experts
Washington: Researchers suggested that people who show severe COVID-19 infection might shed the virus and hence be infectious for as long as 20 days. Whereas, the infection does not last for more than nine days in people with mild or no symptoms of the virus. The review published in the journal Infection Control and Hospital Epidemiology. A review of dozens of studies by researchers at Oregon Health and Science University and Oregon State University suggests that people may shed virus for prolonged periods.
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This is in line with the guidance provided by the US Centers for Disease Control and Prevention, confirming recommendations for the length of time people should isolate the following infection with SARS-CoV-2.
“Detection of viral RNA may not correlate with infectivity since available viral culture data suggests shorter durations of shedding of viable virus,” as per the authors. “Additional data is needed to determine the duration of shedding of viable virus and the implications for risk of transmission.” Researchers decided to conduct the review to gain more information on transmission and to help inform infection control practices, said co-author Monica Sikka, MD, assistant professor of medicine (infectious diseases) in the OHSU School of Medicine.
Even though people can shed virus for a prolonged period of time, the studies we reviewed indicated that live virus, which may predict infectiousness, was only detected up to nine days in people who had mild symptoms, Ms. Sikka said.
The researchers identified 77 studies worldwide, including 59 that had been peer-reviewed, and combed through the results. All studies reported assessments of viral shedding using standard methods to identify the virus by replicating it through a process called a polymerase chain reaction, or PCR.
Although PCR positivity can be prolonged, culture data suggest that virus viability is typically shorter in duration, the authors added.
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NDTV – Dettol Banega Swasth India campaign is an extension of the five-year-old Banega Swachh India initiative helmed by Campaign Ambassador Amitabh Bachchan. It aims to spread awareness about critical health issues facing the country. In wake of the current COVID-19 pandemic, the need for WASH (Water, Sanitation and Hygiene) is reaffirmed as handwashing is one of the ways to prevent Coronavirus infection and other diseases. The campaign highlights the importance of nutrition and healthcare for women and children to prevent maternal and child mortality, fight malnutrition, stunting, wasting, anaemia and disease prevention through vaccines. Importance of programmes like Public Distribution System (PDS), Mid-day Meal Scheme, POSHAN Abhiyan and the role of Aganwadis and ASHA workers are also covered. Only a Swachh or clean India where toilets are used and open defecation free (ODF) status achieved as part of the Swachh Bharat Abhiyan launched by Prime Minister Narendra Modi in 2014, can eradicate diseases like diahorrea and become a Swasth or healthy India. The campaign will continue to cover issues like air pollution, waste management, plastic ban, manual scavenging and sanitation workers and menstrual hygiene.