Long COVID Risk From Omicron Less Than Delta
The findings are from the first peer-reviewed study to report risk of persistent COVID and Omicron variant.
Symptoms include fatigue, shortness of breath, loss of concentration, and joint pain. Symptoms can adversely affect daily activities and in some cases, can be severely limited.
The researchers found the odds of experiencing sustained COVID were 20 to 50 percent lower in the Omicron stage than in the Delta stage, depending on age and time since vaccination.
Long COVID risks
The study identified 56,003 UK adults with their first positive result between 20 December 2021 and 9 March 2022, when Omicron was the predominant strain. The researchers compared these cases with 41,361 cases, which first tested positive between June 1, 2021 and November 27, 2021, when the Delta variant predominated. .
The analysis found that 4.4% of Omicron cases were long-term COVID, compared with 10.8% of Delta cases. However, the absolute number of people experiencing sustained COVID was higher during the Omicron period.
This is because so many people were infected with Omicron between December 2021 and February 2022. The UK Office for National Statistics estimates the number of people with long-term COVID has actually increased from 1.3 million in January. 2022 to 2 million by May 1, 2022.
Lead author Dr Claire Steves from King’s College London, said: “The Omicron variant is fundamentally less likely to cause long-term COVID than previous variants but still 1 in 23 people contract COVID. -19 continues to have symptoms for more than four weeks. Given the number of people affected, it is important that we continue to support them at work, at home and in the NHS.”