Symptoms involving almost every organ system have been reported after SARS-CoV-2 infection.123 Estimates of the prevalence of long covid (also called post-covid-19 condition, post-acute sequelae of covid-19, or chronic covid syndrome) vary considerably, partly because of confusion around the definition. The term long covid encompasses a broad range of symptoms, including objective complications of covid-19 (pulmonary fibrosis, myocardial dysfunction), mental health conditions, and more subjective, non-specific symptoms resembling those seen in post-viral chronic fatigue syndrome (myalgic encephalomyelitis). Most studies to date have substantial limitations, including small cohorts, absence of control groups, non-standardised capture of symptoms, lack of correction for pre-existing medical conditions, participant reported infection, and variation in follow-up, as well as selection, non-response, misclassification, and recall biases.4
In children and adolescents, acute covid-19 is less severe than in adults.56 Concern among many parents has therefore focused more on the potential long term effects of SARS-CoV-2 infection. Unfortunately, fewer data are available on long covid in young people compared with adults.7 The widely quoted one in seven frequency in children is based on a study with a 13% response rate.78
The linked study by Magnusson and colleagues (doi:10.1136/bmj-2021-066809) used nationwide register data from Norway to estimate the impact of covid-19 on long term healthcare use among 1.3 million children and adolescents.9 The authors identified a short term increase in primary (but not specialist) care use after covid-19 in all the studied age groups. This increase was related to respiratory and general or non-specific conditions, mostly in the four weeks after infection. The increase in primary care use persisted for up to six months among children aged 1-5 years. Notably, covid-19 in children had limited overall impact on healthcare services.
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Source: Petra Zimmermann. Long covid in children and adolescents. BMJ 2022; 376 doi: https://doi.org/10.1136/bmj.o143 (Published 20 January 2022) https://www.bmj.com/content/376/bmj.o143.full (Full article)