Risk of COVID-19 in children treated for demyelinating disorders in the UK

ABSTRACT

Objective: Paediatric neurologists are concerned about the risk of COVID-19 in children with demyelinating disorders receiving immunomodulatory treatment. To investigate this, we collected data via the UK Childhood Neuro-Inflammatory Disorders (UK-CNID) network of the British Paediatric Neurology Association (BPNA). Methods: Survey of paediatric neurologists managing unvaccinated UK children (<18 years) with a demyelinating disorder (multiple sclerosis [MS];neuromyelitis optica spectrum disorder [NMOSD] and myelin oligodendrocyte glycoprotein antibody disease [MOGAD]) on immunomodulatory therapy with SARS-CoV-2 infection confirmed by reverse transcriptase-polymerase chain reaction (RT-PCR) of nasopharyngeal swabs between March and December 2020. Results: Of 151 UK children (MS 98, MOGAD 37, NMOSD 16) with a median age of 9 years (range 6-18y), with a demyelinating disorder, nine (6.0%) had a positive PCR for SARS-CoV-2. Five had MS and four MOGAD. Four were from south Asian or south-east Asian, four were White and one was mixed White and south Asian. Seven children had COVID-19 symptoms;two were asymptomatic. Two required a brief hospital admission for typical COVID-19 respiratory symptoms and the remaining five had mild symptoms including fever, rash, cough and headache. One with MOGAD, treated with azathioprine, developed transverse myelitis 12 days after COVID-19 onset. She recovered fully with a course of corticosteroids. MS patients were on following disease modifying therapies;dimethylfumarate (n=2), fingolimod (n=1);natalizumab (n=1) and ocrelizumab (n=1). MOGAD cases were on the following immune therapy combination of oral prednisolone and intravenous immunoglobulin (n=2), prednisolone steroids (n=1) and azathioprine (n=1). Conclusions: In contrast to adult patients, who often have underlying co-morbidities and advanced neurological disabilities, we have identified that children treated for demyelinating disorders appear to have a milder COVID-19 course. Whilst the number of children treated for demyelinating disorders that developed COVID-19 is low, the overall mild course described may provide reassurance to neurologists, patients and family members.