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Letter to the Editor| Volume 86, ISSUE 4, e97-e99, April 2023

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Prevalence and clinical features of long COVID from omicron infection in children and adults

Published:February 14, 2023DOI:https://doi.org/10.1016/j.jinf.2023.02.015
      We read with interest the article reported by Elda Righi et al. about persistent symptoms after COVID-19.
      • Righi E.
      • Mirandola M.
      • Mazzaferri F.
      • Dossi G.
      • Razzaboni E.
      • Zaffagnini A.
      • et al.
      Determinants of persistence of symptoms and impact on physical and mental wellbeing in Long COVID: a prospective cohort study.
      Following acute infection, various long-lasting symptoms such as fatigue, headache, cough, and muscle pain are described as “long COVID.”
      • Callard F.
      • Perego E.
      How and why patients made long Covid.
      The World Health Organization (WHO) and the United States Centers for Disease Control and Prevention (CDC) have given incongruous definitions.

      World Health Organization. Post COVID-19 condition (long COVID). 〈https://wwwwhoint/europe/news-room/fact-sheets/item/post-covid-19-condition〉 Accessed Jan 15, 2023.

      • Chippa V.
      • Aleem A.
      • Anjum F.
      Post acute coronavirus (COVID-19) syndrome.
      The prevalence of long COVID varies widely, partly because of variability in definitions, study design, sampling frame, vaccine status, comorbidity, and other factors.
      • Perlis R.H.
      • Santillana M.
      • Ognyanova K.
      • Safarpour A.
      • Lunz Trujillo K.
      • Simonson M.D.
      • et al.
      Prevalence and correlates of long COVID symptoms among US adults.
      A study from the United Kingdom revealed that long COVID symptoms lasting more than 4 weeks were reportedly less frequent after Omicron infection (4.5%) than after Delta infection (10.8%).
      • Antonelli M.
      • Pujol J.C.
      • Spector T.D.
      • Ourselin S.
      • Steves C.J.
      Risk of long COVID associated with delta versus omicron variants of SARS-CoV-2.
      The variation of coronavirus also played an essential role in affecting the prevalence of long COVID. We investigated the prevalence and clinical features of long COVID from Omicron infection by searching relevant studies in major databases.
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        Determinants of persistence of symptoms and impact on physical and mental wellbeing in Long COVID: a prospective cohort study.
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