Il Long Covid affects more i vaccinated oppure i no vax? The team led by clinical epidemiologist Ziyad Al-Aly found that vaccination reduces the risk of developing covid long after infection by only about 15%, which is substantially lower than other estimates suggesting vaccines cut in half. the risk.
How frequent is long COVID? And how much protection do vaccines give against it? Why the public and policymakers are grappling with disparate answers to these basic questions https://t.co/2wGM40xKwF
— nature (@Nature) June 20, 2022
The differences between Omicron and Delta
Among adults vaccinated against COVID-19, the odds of developing long COVID during the omicron wave were approximately 20-50% lower than during the delta period, with variability based on age and time since vaccination. The finding comes from a case-control observational study published this week in The Lancet by researchers at Kings College London. The study found that approximately 4.5% of omicron vaccination cases resulted in long-term COVID, while 10.8% of delta vaccination cases resulted in this long-term condition.
I study
For the Lancet study, researchers looked at self-reported symptom data from 56,003 UK adults who were first infected with SARS-CoV-2 during the omicron wave and 41,361 UK adults. Kingdom that were initially infected during the delta period. The researchers, led by Claire Steves, senior clinical lecturer at King’s College London, defined long-term COVID as the presence of new or persistent symptoms four or more weeks after the onset of acute COVID-19, as defined in the guidelines of the US National Institute for Health and Care Excellence. When the researchers took into account age, time since vaccination, and other health-related factors, the relative odds of developing long covid after omicron ranged from about 23 percent to 50 percent. The odds were best when people were closest to vaccination (within less than three months) and aged 60 or older.