Oxford Academic recently published (05/10/23) a community-based cohort study into the risk of new-onset Long Covid following reinfection with SARS-CoV-2. Little was known about the risk so the authors estimated the likelihood of new-onset, self-reported Long Covid after a second SARS-CoV-2 infection, and compared it to a first infection.
The study showed that the risk of new-onset Long Covid after a second SARS-CoV-2 infection is lower than that after a first infection for those ≥16 years, though there is no evidence of a difference in risk for those <16 years. However, there remains some risk of new-onset Long Covid after a second infection, with around 1 in 40 of those ≥16 years and 1 in 165 of those <16 years reporting Long Covid after a second infection.
The summary can be read here, which includes a link to the full report.