COVID-19 in children accounts for up to 8% of all the cases and is less severe than in adults. This could be an underestimation. A significant number of children are asymptomatic. Symptomatic infection is hard to distinguish from other respiratory tract viral infections based on symptoms and laboratory results. Anosmia is the only symptom in children that is highly suggestive of COVID-19. Infected children mostly have a positive household member. However, the role of children in SARS-CoV-2 transmission is still controversial. Data suggest that schoolchildren have a greater impact in SARS-CoV-2 transmission compared to younger children. Multisystem inflammatory syndrome in children is a new entity reported since April 2020 and is considered a rare complication of SARS-CoV-2 infection. It occurs in previously healthy older children and adolescents presenting with multisystem involvement and elevated inflammatory markers. Most children respond well to immune-modifying therapy. Treatment of COVID-19 in children is based solely on data received from adults and consists of supportive treatment and, in rare occasions, antiviral therapy (remdesivir), corticosteroids (dexamethasone) and monoclonal antibodies (tocilizumab). Further studies in children are needed in order to better understand this disease. This article discusses clinical presentation and therapeutic options for COVID-19 in children.
The molecular diversity of Epstein–Barr virus (EBV) is exceptionally complex and based on the characterization of sequences coding for several viral genes. The aim of this study was to analyze the distribution of EBV types 1 and 2 and to characterize LMP1 variants in a cohort of 73 patients with infectious mononucleosis (IM), as well as to investigate a possible association between viral diversity and relevant clinical parameters. Population-based sequencing of EBNA-2 gene showed the presence of EBV type 1 in all IM patients. Analysis of LMP1 gene found a restricted repertoire of LMP1 variants with the predominance of wild-type B95-8, China1, Mediterranean and North Carolina variants with the presence of more than one LMP1 variant in 16.4% of patients. Co-infections with different LMP1 variants were associated with significantly higher levels of C-reactive protein and lower levels of maximal neutrophil counts and minimal platelet count. The results of this study have shown a narrow repertoire of LMP1 variants and an exclusive presence of EBV type 1 in a cohort of IM from Croatia, suggesting a characteristic local molecular pattern of this virus. The clinical importance of distinct immunobiological features of IM patients with LMP1 variant co-infections needs to be investigated further.
The infection risk among frontline health care workers (HCW) is one of the most concerning aspects of COVID-19. Knowledge about SARS-CoV-2 transmission is still insufficient. However, direct, person-to-person contact appears to be the main route. Secondary transmission can also occur and intensive care units have shown greater contamination than general wards. Risk of transmission by infectious aerosols distributed through the ventilation system duct is considered to be very low. Screening and triaging everyone entering a health care facility is crucial in order to prevent rapid spread among hospital personnel and patients. Recommendations on airborne precautions in the health care setting vary by location, but are universally to be implemented when aerosol-generating procedures are performed. Surgical masks or respirators are currently critical supplies that should be reserved for HCW. Both types of masks need to be used in combination with other personal protective equipment measures. COVID-19 patients should be cohorted and only patients undergoing aerosol generating procedures should be placed in airborne infection isolation rooms.
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