Analysis by researchers from King’s College London, based on data collected from the ZOE COVID Sympton research application published on June 16 and pending review by The Lancet, confirms that Omicron is very unlikely to cause Covid-19 prolonged (long-Covid) compared to Delta.
Follow Medical Xpress, This is the first peer-reviewed study to report a link between prolonged Covid-19 risk and Omicron mutation.
Only 4.4% “former F0” Omicron reported prolonged Covid-19 – Photo: MEDICAL XPRESS
Persistent Covid-19 is defined according to NICE (National Institute of Health and Clinical Excellence) guidelines as new or continuing symptoms that persist for 4 weeks or more after the onset of illness. .
Commonly reported symptoms include fatigue, shortness of breath, loss of concentration, and joint pain, which can adversely affect daily activities and in some cases can be severely limiting.
The researchers found that sustained Covid-19 survival rates were 20-50% lower in the Omicron stage than in the Delta stage, and this rate was dependent on both age and duration of Covid-19 vaccination. . Prior to this, a lot of evidence showed that vaccination not only reduces the risk of serious illness but also reverses the risk of long-term and post-Covid-19 Covid-19.
The study identified 56,003 cases of adults in the UK who tested positive for the first time between December 20, 2021 and September 9, 2022 when Omicron was the dominant strain. They compared these cases with the first 41,361 cases that tested positive between 1-62021 and November 27, 2021 when the Delta variant prevailed.
The analysis found that 4.4% of Omicron cases had persistent Covid-19, compared with 10.8% of Delta cases.
Lead author, Dr Claire Steves from King’s College London, said: “The omicron variant is essentially less likely to cause Covid-19 to persist than previous variants, but still has 1 in 23 people with COVID-19 continue to have symptoms for more than 4 weeks.”
According to Dr. Steves, the above results relieve concern for the “former F0” Omicrons, who probably already make up the majority of the community, but also show that the health policies of countries still need to pay attention to the veterans. This F0, especially those who are at risk.