Reviews on Long COVID: A scope of the literature:Update October 2023

• For this update, we identified 46 published reviews and 44 review protocols for Long COVID. The number of published reviews has increased since our last two quarterly reports in April (n=37) and July (n=31). • Most published reviews were focused on the prevalence of symptoms or effects (20/46), which is consistent with the earlier reports. • We identified fewer published reviews with a primary focus on Long COVID risk factors (1/46) than in July (6/31), and more on treatment or rehabilitation (n=11 vs n=5 in July). • We identified more reviews on pathobiology or mechanisms (n=6) compared with July (n=1). • Most of the protocols were focused on the prevalence of symptoms or effects (24/44), unlike in the three previous reports, where more protocols were focused on treatment or rehabilitation. • Most of the other protocols were focused on treatment (8/44), or risk factors with or without prevalence (7/44).