> **来源：[研报客](https://pc.yanbaoke.cn)** # World Health Organization Global Respiratory Virus Activity Weekly update for week 6, ending 08 February 2026 Update No. 565 GLOBAL INFLUENZA SURVEILLANCE AND RESPONSE SYSTEM (GISRS) Co-circulation Influenza SARS-CoV-2 RSV Severity assessment # SUMMARY Globally, influenza activity remained stable and positivity was just above $15\%$ in week 6 2026. SARS-CoV-2 activity remained low overall. Influenza predominated and positivity was around $15\%$ in the northern hemisphere temperate and subtropical areas and the tropical areas. In the southern hemisphere temperate and subtropical areas, influenza and SARS-CoV-2 positivity were both low. [Figures 1a, 1b, 1c and 1d]. # Influenza Globally, influenza detections continued to decline in week 6. Influenza A viruses were predominant among influenza detections, with a slight increase in the proportion of influenza B virus detections in recent weeks. [Figure 2] In the northern hemisphere, influenza percent positivity was elevated $(>10\%)$ in countries in North America, Western Africa, Western, Southern and South-East Asia. Percent positivity was over $30\%$ in countries in Central America and the Caribbean, Tropical South America, Northern Africa, Europe and Eastern Asia. Increases in activity were observed in single countries in Central America and the Caribbean, Western Africa, Northern Europe and Eastern Asia and in two or more countries in South West and Eastern Europe. [Figures 3 and 4] In the southern hemisphere, influenza activity remained low overall although elevated positivity $(>10\%)$ was reported in single countries in Temperate South America and Eastern Africa and two countries in Tropical South America. Percent positivity was over $30\%$ in a single country in Oceania. No increases in activity were observed in any countries in the southern hemisphere. [Figures 3 and 4] In the zones with elevated positivity, influenza A(H3N2) was predominant in most of the zones except Western Africa where influenza B was predominant. [Figures 5 and 6] # SARS-CoV-2 Globally, SARS-CoV-2 positivity remained stable and low, with single countries reporting elevated positivity $(>10\%)$ in Temperate South America, South West and Northern Europe. Small increases in activity were reported in single countries in South West and Northern Europe. [Figures 7 and 8] # Respiratory Syncytial Virus (RSV) Globally, RSV positivity remained stable and low, with a few countries reporting elevated positivity ( $>10\%$ ) in Central America and the Caribbean, Northern Africa, South West and Northern Europe and Western Asia. Small increases in activity were reported in a few countries in Central America and the Caribbean and Northern Europe and in single countries in Northern Africa, South West and Eastern Europe and Western Asia. [Figures 9 and 10] RSV and influenza activity were both elevated in countries in Central America and the Caribbean, Northern Africa, South West and Northern Europe and Western Asia. # Severity assessment The severity assessments here are reported from countries, areas and territories. Assessments for transmissibility can be reported based on syndromic parameters and/or influenza-specific parameters. In the northern hemisphere temperate and subtropical areas, influenza-specific transmissibility was reported as low (1) and moderate (1); transmissibility using syndromic data was reported as below seasonal threshold (12), low (8), moderate (12) and high (1). Influenza-specific transmissibility was reported as below seasonal threshold in a single country in the southern hemisphere temperate and subtropical areas. [Figures 11 and 12] # Co-circulation of influenza and SARS-CoV-2 1a) Weekly numbers of influenza and SARS-CoV-2 virus specimens tested and percent positivity at the global level (last 12 months) 1b) Weekly numbers of influenza and SARS-CoV-2 virus specimens tested and percent positivity in northern hemisphere temperate and subtropical areas 1c) Weekly numbers of influenza and SARS-CoV-2 virus specimens tested and percent positivity in tropical areas 1d) Weekly numbers of influenza and SARS-CoV-2 virus specimens tested and percent positivity in southern hemisphere temperate and subtropical areas # Influenza 2) Weekly numbers of influenza virus positive specimens by type and subtype at the global level (last 12 months) 3) Proportions of specimens that tested positive for influenza (year-week: 2026-06) 4) Change in proportions of specimens that tested positive for influenza (year-week: 2026-06) 5) Proportions of influenza virus types and subtypes by influenza transmission zones (year-week: 2026-06) 6) Weekly distribution of influenza virus types and subtypes by geographic zone (last 12 months) # SARS-CoV-2 7) Proportions of specimens that tested positive for SARS-CoV-2 (year-week: 2026-06) 8) Change in proportions of specimens that tested positive for SARS-CoV-2 (year-week: 2026-06) # Respiratory syncytial virus 9) Proportions of specimens that tested positive for RSV (year-week: 2026-06) 10) Change in proportions of specimens that tested positive for RSV (year-week: 2026-06) # Severity assessment 11) Influenza specific transmissibility (year-week: 2026-06) 12) Syndromic transmissibility (year-week: 2026-06) 13) Number of countries, areas or territories reporting to FluNet (from year-week 2026-02 to year-week 2026-06) # Additional information # Data and methods The data presented in this report originates from virologic surveillance conducted by countries, areas, and territories (CATs) and submitted to WHO FluNet through participation or collaboration with the Global Influenza Surveillance and Response System (GISRS). These CATs employ diverse methodologies to monitor respiratory virus activity, which may result in variations between this report and other surveillance summaries published elsewhere. This report includes virologic data from both sentinel surveillance and other systematically conducted surveillance. Due to differences in surveillance strategies, direct comparisons of percent positivity between CATs should be interpreted with caution. The data source used for each CAT was decided jointly corresponding with WHO Regional Offices and the respective reporting entity. The completeness of data reporting to FluNet changes over time and countries may revise data reported for previous weeks. To assess trends, the proportion of specimens tested positive for influenza or SARS-CoV-2 was smoothed over a 3-weeks period. This analysis includes only countries that tested 10 or more specimens in at least two of the three weeks. Weekly changes in the smoothed positivity rate for each virus were calculated as absolute differences from the previous week. These absolute changes were categorized and visualized in the proportion change maps. Analyses stratified by source of surveillance are available through RespiMart. The influenza transmission zones map is based on data aggregated over a 3-weeks period, moving backward from the current week until a minimum threshold of 100 tested samples is reached within each influenza transmission zone. Pie charts are displayed on the map only if the total percent positivity in a influenza transmission zones map is $20\%$ or higher. All trend analyses are based on ISO 8601 calendar week numbering. Activity summaries are organized by geographical groupings of CATs. These groupings are intended solely for geographic reference and do not imply uniformity in respiratory virus transmission patterns within each group. It is important to note that specimens tested for influenza, SARS-CoV-2, and RSV may not originate from the same sample sources within surveillance systems. # Severity assessments: The severity assessments here are reported from countries, areas and territories. WHO's Pandemic influenza severity assessment (PISA): a WHO guide to assess the severity of influenza in seasonal epidemics and pandemics, 2nd ed outlines the methods for which countries, areas and territories can derive these severity assessments. Assessments for transmissibility can be reported based on syndromic parameters and/or influenza-specific parameters. Countries, areas and territories may not provide assessments year-round. The assessments may be revised over time if there is retrospective/delayed reporting or updating of previously reported data. These assessments are made in the context of historical data from the country making the assessment and thus are not comparable between countries. Assessments may differ between countries, areas and territories because differences may exist in the circulating seasonal influenza viruses, the timing of the outbreaks or epidemics, the populations and surveillance systems and the underlying data and methods used to assess severity. The quality and consistency of influenza surveillance data are influenced by changes in health seeking behaviours, routines in sentinel and non-sentinel sites, national testing priorities and capacities, and public health and social measures implementation. Differences between information products published by WHO, national public health authorities and other sources are to be expected and must be interpreted carefully. More severity assessment information and outputs can be found here. Suggested citation: Global respiratory virus activity: weekly update No 565 (week 2026-06). Geneva: World Health Organization; 2026; Licence: CC BY-NC-SA 3.0 IGO. # Disclaimer: The designations employed and the presentation of the material in this publication do not imply the expression of any opinion whatsoever on the part of WHO concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. Dotted and dashed lines on maps represent approximate border lines for which there may not yet be full agreement. The mention of specific companies or of certain manufacturers' products does not imply that they are endorsed or recommended by WHO in preference to others of a similar nature that are not mentioned. Errors and omissions excepted, the names of proprietary products are distinguished by initial capital letters. All reasonable precautions have been taken by WHO to verify the information contained in this publication. However, the published material is being distributed without warranty of any kind, either expressed or implied. The responsibility for the interpretation and use of the material lies with the reader. In no event shall WHO be liable for damages arising from its use. Additional surveillance outputs: WHO Influenza Surveillance Outputs Contact: flupdate@who.int or Click here to subscribe to the mailing list. Summary was generated by the WHO Global Influenza Programme based on data last updated in RespiMart on February 15 2026 03:14:11 PM UTC