Data on respiratory virus surveillance are provided to WHO through participation or collaboration with the Global Influenza Surveillance and Response System (GISRS).

Countries, areas, and territories use a variety of approaches to monitor respiratory virus activity, and data in this report may vary from surveillance reports posted elsewhere. Data in this dashboard include virologic results from sentinel surveillance and other types of systematically conducted virologic surveillance, depending on the countries, areas, and territories.

Differences in surveillance approaches limit comparison of percent positivity between countries, areas, and territories. The source to use in the dashboardwas determined in collaboration with WHO Regional Offices and the reporting countries, areas, and territories. Analyses stratified by source of surveillance is available through the GISRS surveillance data dashboard alongside influenza circulation.

The data presented in this section shows the volume of testing, the number of detections, and the percent positivity for SARS-CoV-2 over time. Data is excluded whenever only the number of SARS-CoV-2 positives or negatives is reported without the denominator (number of samples tested).

Currently, there are a limited number of countries reporting this data to GISRS in a timely and consistent way. When world or a WHO Region is selected, the data reported to date might be from a limited number of countries, and thus the trends in percent positivity do not reflect the situation as a whole in the region or globally.

The quality and consistency of current data are influenced by changes in health-seeking behaviors, routines in sentinel sites, national testing priorities, and capacities.

The data is subject to change over time if there is retrospective and delayed reporting or updating of previously reported data.

Global Influenza Program influenza updates can be found here.

Data on variants are provided through GISAID.

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Regional reclassification for Indonesia: 1 January 2025, Indonesia has been reclassified from the WHO South-East Asia Region to the Western Pacific Region. As a result, data to and including 31 December 2024 will be reported under the South-East Asia Region, while data from 1 January 2025 onward will be reported under the Western Pacific Region for this country up.

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