Three years after its emergence, coronavirus disease 2019 (COVID-19) continues to be a leading cause of worldwide morbidity and mortality. This systematic review comprises relevant case reports that discuss non-multisystem inflammatory syndrome in children (non-MIS-C) and postacute sequalae of COVID-19 (PASC) in the paediatric population, also known as long COVID syndrome. The study aims to highlight the prevalent time interval between COVID-19 and the development of non-MIS-C post-infectious sequalae (PIS). Databases were searched for studies that met our inclusion and exclusion criteria. The final screening revealed an equal sex distribution where the commonest age intervals were school-age and adolescence, with 38% of the patients being older than six years. Interestingly, hospital admission during the course of COVID-19 was not a predictor of the subsequent PASC; forty-nine patients (44.9%) were hospitalized while sixty patients (55.1%) were not hospitalized. Moreover, the most predominant time interval between COVID-19 and the developing PASC was within 14 days from the start of COVID-19 infection (61%). These findings suggest a crucial link between COVID-19 and immune PIS in the paediatric population, especially those older than six years. Accordingly, follow-up and management are encouraged in case of unusual symptoms and signs following COVID-19 infection, regardless of the COVID-19 infection severity.

Introduction: The rapid emergence of COVID-19 as a global crisis has led to the approval of many vaccinations, which were unfortunately associated with high complication rates due to a lack of sufficient safety studies. Objectives: The following manuscript focuses on discussing the demyelinating disorders that were noticed after COVID vaccine administration. Methods: We conducted a retrospective study using anonymous medical records from the US vaccine adverse events reporting system, complications retrieved included Acute disseminated encephalomyelitis (ADEM), Guillain Barre syndrome (GBS), and Multiple sclerosis (MS), outcome parameters were age, sex and the dose after which this complication was observed. Patients younger than 18 years-old were excluded as some of the vaccines, namely Janssen (JNJ-78436735) is not yet approved below this age. Results: Our analysis showed that demyelinating disorders were more likely to occur in patients over the age of 50 compared to other age groups, regardless of the type of vaccination, except for MS and ADEM occurrences after the Jansen vaccine. In addition, demyelinating complications were more likely to occur after the first dose of vaccination. Conclusion: Further research and observation of demyelinating diseases in different vaccinations, as well as additional in vitro studies, are recommended to further explain the pathogenesis of demyelinating disorder occurrence.

<p>  </p> <h2>Introduction:</h2> <p>Coronavirus Disease 2019 (COVID-19) is by far the most world-altering pandemic to ever hit modern humanity. Three years after the very first case emerged in December 2019, the virus continues to bring upon global disarray in the acute phase of the infection as well as months afterwards, causing the virus’s morbidity and mortality to further skyrocket. This systematic literature review was conducted up till December 2022, comprising all the case reports that thoroughly discuss a myriad of non-Multisystem Inflammatory Syndrome In Children (non-MIS-C) post-acute sequalae of COVID-19 (PASC) in the paediatric population, also known as Long COVID Syndrome.  In this review, we aimed to highlight the prevalent time interval between COVID-19 infection and the development of various non-MISC post-infectious sequalae (PIS). </p> <h2>Methods:</h2> <p>We conducted a holistic literature search on PubMed, Google Scholar, Google Search, and Scopus. Data bases were searched for studies that met our inclusion and exclusion criteria. The systematic review was performed on all case reports containing relevant outcome parameters such as age, sex, the interval between COVID-19 infection and subsequent PASC and, lastly, the need for hospitalization during the course of the disease.</p> <h2>Results: </h2> <p>We collected a total of 78 case reports discussing the various post-infectious immune sequalae following COVID-19 infection in the paediatric population, consisting of a total of 109 patients. The final screening revealed an equal sex distribution, whereas the two commonest age intervals were school-aged children and adolescents, with 38% of the patients having been older than six years. Interestingly, hospital admission throughout the course of COVID-19 wasn’t a predictor of the subsequent PASC; forty-nine patients (44.9%) were hospitalized while sixty patients (55.1%) were not hospitalized. More importantly, the most predominant time interval between COVID-19 infection and the developing PASC was observed to be within 14 days since the start of COVID-19 infection, accounting for 61% of the cases. </p> <h2>Conclusion: </h2> <p>These findings suggest a crucial link is slowly but surely unfolding between COVID-19 and an abundance of systemic post-infectious immune sequalae in the paediatric population, especially amongst children older than six years. Accordingly, meticulous follow-up and prompt management is largely encouraged for the paediatric population in case of unusual symptoms and signs following COVID-19 infection, regardless of COVID-19’s severity.  </p>

<p>  </p> <h2>Introduction:</h2> <p>Coronavirus Disease 2019 (COVID-19) is by far the most world-altering pandemic to ever hit modern humanity. Three years after the very first case emerged in December 2019, the virus continues to bring upon global disarray in the acute phase of the infection as well as months afterwards, causing the virus’s morbidity and mortality to further skyrocket. This systematic literature review was conducted up till December 2022, comprising all the case reports that thoroughly discuss a myriad of non-Multisystem Inflammatory Syndrome In Children (non-MIS-C) post-acute sequalae of COVID-19 (PASC) in the paediatric population, also known as Long COVID Syndrome.  In this review, we aimed to highlight the prevalent time interval between COVID-19 infection and the development of various non-MISC post-infectious sequalae (PIS). </p> <h2>Methods:</h2> <p>We conducted a holistic literature search on PubMed, Google Scholar, Google Search, and Scopus. Data bases were searched for studies that met our inclusion and exclusion criteria. The systematic review was performed on all case reports containing relevant outcome parameters such as age, sex, the interval between COVID-19 infection and subsequent PASC and, lastly, the need for hospitalization during the course of the disease.</p> <h2>Results: </h2> <p>We collected a total of 78 case reports discussing the various post-infectious immune sequalae following COVID-19 infection in the paediatric population, consisting of a total of 109 patients. The final screening revealed an equal sex distribution, whereas the two commonest age intervals were school-aged children and adolescents, with 38% of the patients having been older than six years. Interestingly, hospital admission throughout the course of COVID-19 wasn’t a predictor of the subsequent PASC; forty-nine patients (44.9%) were hospitalized while sixty patients (55.1%) were not hospitalized. More importantly, the most predominant time interval between COVID-19 infection and the developing PASC was observed to be within 14 days since the start of COVID-19 infection, accounting for 61% of the cases. </p> <h2>Conclusion: </h2> <p>These findings suggest a crucial link is slowly but surely unfolding between COVID-19 and an abundance of systemic post-infectious immune sequalae in the paediatric population, especially amongst children older than six years. Accordingly, meticulous follow-up and prompt management is largely encouraged for the paediatric population in case of unusual symptoms and signs following COVID-19 infection, regardless of COVID-19’s severity.  </p>