Overview of Pediatric Respiratory Syncytial Virus (RSV) infections: has risk perception for RSV changed in children with comorbid conditions?

Objective: Respiratory syncytial virus (RSV) is the primary etiology of lower respiratory tract infection in children. The fluctuating incidence of RSV, particularly in light of the COVID-19 pandemic, has shifted the spotlight onto preventive strategies. Our study aims to investigate both the risk factors and clinical symptoms of RSV.

Materials and methods: From February 2015 to February 2023, samples were analyzed during all seasons to identify viral respiratory infections. RSV was identified in a total of 835 individuals.

Results: In 2021, following the easing of limitations after the COVID-19 pandemic, the largest number of identified cases was recorded. January was the most commonly used month. The median age were 5 months (min-max: 1-204 months) and 128 (17.7%) cases had a history of prematurity. Around 24.7% of the patients had a preexisting medical condition. Neurological disease patients were followed up in the intensive care unit more often than others (53.3 vs. 35.8% p = 0.036). While the hospital stay of pediatric patients born under the 29th week of gestation is almost twice as long compared to other groups, the hospital stay is almost twice as long as that of patients between 29 and 32 weeks. (p = 0.046, p = 0.012 respectively).

Conclusion: RSV was a powerful companion during the pandemic and a persistent reminder of its severity. Our initial data suggest that RSV prevention is difficult for children with pre-existing diseases, notably neurological abnormalities, who are not advised for preventive treatments. Given this outcome, late-premature newborns and children with medical issues should receive RSV prophylaxis first.