Because most respiratory infections occur mainly in the winter, the data are presented for a respiratory season or a respiratory year. A respiratory year runs from week 40 of one year through week 39 of the following year. A respiratory season runs from week 40 of one year through week 20 of the following year. On this page, the data for 2024/2025 are limited to the respiratory season. More background information about the different surveillance sources can be found in the document ‘Background and methods of the respiratory surveillance 2024/2025’.  

Because most respiratory infections mainly occur in winter, the data for influenza and RS-virus are presented for a respiratory season that runs from week 40 of one year through week 20 of the following year. For the coronavirus SARS-CoV-2, which causes the disease COVID-19, weeks 21 to 39 of 2024 are also described (the period prior to the 2024/2025 respiratory season). For more details about the different surveillance sources, see ‘Background and methods on respiratory surveillance 2024/2025’. 

On this page, you can find information about the surveillance of: acute respiratory infections (including influenza-like illness (ILI)), also known as acute respiratory infection (ARI), including:children with bronchiolitis in primary care,pneumonia in primary care, andsevere acute respiratory infections (SARI).Because most respiratory infections mainly occur in winter, the numbers are presented for a respiratory season or a respiratory year. A respiratory season runs from week 40 of one year through week 20 of the following year. A respiratory year runs from week 40 of one year through week 39 of the following year. This report looks at the respiratory season 2024/2025.

During the respiratory season 2024-2025 (week 40 of 2024 through week 20 of 2025), several viruses that can cause acute respiratory infections circulated, as usual for the winter period. The highest number of people with acute respiratory infections was observed during the period when influenza virus was widespread. In young children, the peak in respiratory infections coincided with the period when RS-virus (RSV) was circulating. During the winter, the coronavirus SARS-CoV-2 was not widely circulating. This virus mainly caused respiratory complaints during the summer and autumn of 2024. In cooperation with the National Intensive Care Evaluation (NICE) registry, the RIVM publishes information about respiratory infections that are severe enough to require admission to the intensive care unit (ICU). During the respiratory season 2024-2025, a peak in ICU admissions due to respiratory infections was observed during the period when influenza virus was widespread. 

Because most respiratory infections occur mainly in the winter, the data are presented for a respiratory season or a respiratory year. A respiratory year runs from week 40 of one year through week 39 of the following year. A respiratory season runs from week 40 of one year through week 20 of the following year. On this page, the data for 2024/2025 are limited to the respiratory season. More background information about the different surveillance sources can be found in the document 'Background and methods of the respiratory surveillance 2024/2025'.

Infectious disease control requires more than just biomedical knowledge. Social science research also contributes to this. Through social science research RIVM monitors the behaviour, needs, suggestions, and experiences of residents and professionals.

This page provides an overview of publications relating to additional research into (micro)nutrients.

The National Institute for Public Health and the Environment (RIVM) uses personal data. The general privacy statement of RIVM outlines why RIVM uses personal data and explains why RIVM is allowed to do so. Supplementing the general privacy statement, this privacy statement describes a number of tasks legally assigned to RIVM: monitoring, surveillance and scientific research for the purpose of effectively controlling infectious diseases.

The National Institute for Public Health and the Environment (RIVM) uses personal data. The general privacy statement of RIVM outlines why RIVM uses personal data and explains why RIVM is allowed to do so. The Privacy Statement for Infectious Disease Diagnostics is supplementary to the general privacy statement.