Background: Human respiratory syncytial virus (RSV) is responsible for infections mainly affecting the lower respiratory tract in infants and young children after the first exposure. The aim of the study is to show up-to-date information on RSV hospitalization cases in Poland in children aged < 5 years. Methods: A retrospective, population-based study was conducted using data from hospital discharge records of patients hospitalized from 2010–2020. Results: The study group consisted of 57,552 hospitalizations of RSV children. The mean and median ages were 232 (95% CI: 230–234) and 132 (IQR 63–271) days. The mean annual hospitalization rate for patients with RSV infection was estimated to be 267.5 per 100,000, and the highest was observed in children < 1 year (1132.1 per 100,000). The mean annual hospitalization rate was significantly higher in patients living in urban than rural regions (p < 0.001). A statistically significant increase in the number of hospitalizations was observed (p < 0.0001) during the analyzed period. The seasonal pattern was found with the highest rates of hospitalizations in the January–March period. Conclusions: The increasing RSV hospitalization rate requires further research and may be the basis for urgent healthcare measures. The results may be helpful in comparative analyses in the European and global context.

Background: In the face of a sudden influx of several million migrants and war refugees from Ukraine to other European countries, knowledge about the health of Ukrainian citizens becomes increasingly important. The aim of the study is to identify the main health problems of hospitalized Ukrainian citizens residing in Poland in the period from 2014 to June 2022. Methods: This study is based on hospitalization data of Ukrainian patients in Poland taken from the Nationwide General Hospital Morbidity Study. Results: The study group covered 8591 hospitalization records. We observed two hospitalization peaks, one in patients aged 0–5 and the other one in those aged 20–35. After the official outbreak of the war, 2231 Ukrainian citizens were hospitalized in Poland. At this time, the most often reported principal reasons for the hospitalizations of adult women were diseases related to pregnancy, childbirth and the puerperium, whereas in groups of adult men diseases were related to injury, poisoning and certain other consequences of external causes, and in children and adolescents diseases were infectious and parasitic diseases. Conclusions: Our findings may have implications for healthcare policies and service provision to newly arrived migrants and war refugees in target European countries.

Background: Influenza constitutes a significant health care burden that can be related to an increased morbidity and mortality. The aim of the study is to show up-to-date information on influenza hospitalization cases in Poland in children aged <5 years. Methods: The data used in the study were hospitalization records from 2015–2019, which had been gathered in a Nationwide General Hospital Morbidity Study and made available by the National Institute of Public Health. Results: 8565 records of patients with influenza were subject to analysis. The mean and median age of the patients were 2.2 and 2.1 years, respectively. Influenza hospitalization incidence was estimated at 90 per 100,000 person-years (PY) in children aged <5 years. The number of hospitalization cases was significantly higher in patients living in urban regions than in those living in rural regions (97 vs. 77 per 100,000 PY; p < 0.001). The age of patients living in urban regions was significantly lower than the age of patients living in rural regions (2.2 vs. 2.3 years; p < 0.001). A statistically significant increase in hospitalization was observed. Conclusions: The reported increasing trend in hospitalizations indicates the need to take focused measures. Presented data may be useful in comparative analyses in a European context.

Introduction and objective.Congenital herpes simplex virus infection (cHSV) is a rare entity and may pose a life-threatening disease for the newborns. Due to the public health and clinical importance of cHSV infection in infants, the recent data on this disease in Poland should be investigated. The aim of the study was to evaluate the incidence and other factors related to cHSV. Materials and method. The study is retrospective, population-based that utilised the hospital discharge records of cHSV patients. Data were obtained from National Institute of Public Health NIH -National Research Institute in Warsaw, Poland, covering the period 2014-2019.Results. The study group consisted of 1,573 cHSV newborns (841 males and 732 females). Among this group, 70.1% were infants up to 90 days of age and 3.6% were neonates up to 28 days of age. The mean and median age was 98 days (95% CI: 94.5-101.8, SD 74) and 70 days (IQR: 53-104), respectively. Based on the hospital registry the overall average cHSV incidence over the study period was estimated to be 69 per 100,000 live births. The number of cHSV infection fluctuated over the years 2014-2019 with a significant decreasing trend from 2015-2019 (P<0.01). A significantly higher cHSV incidence was observed among patients from urban than rural areas of Poland (88 vs 40/100,000 live births; P<0.001). Conclusions. CHSV incidence may be related to multifactorial conditions for the occurrence of this disease. Further studies on changes in the incidence of cHSV are needed.

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