U.S. Outpatient Influenza-like Illness Surveillance Network (ILINet):
Percentage of Visits for ILI by Age Group Reported by A Subset of ILINet Providers
2025-2026 Season
0-4 years 5-24 years 25-49 years 50-64 years 65+ years
Week Total Visits ILI Total Visits ILI Total Visits ILI Total Visits ILI Total Visits ILI
2025401133105.33818302.36555671.23807810.85471000.6
2025411141585.33714582.36391611.23750600.85411870.6
2025421135005.73643822.46327361.33721690.85408640.6
2025431142545.83685412.56330711.33710480.95423700.6
2025441122396.33573882.86134231.43607010.95301220.6
2025451203746.83806553.46317141.63674811.05373220.7
2025461196397.03689603.76290401.73667091.15364680.8
2025471208897.83760414.36373491.93731231.25478620.9
2025481179249.33118555.35583312.23196961.54782081.1
2025491193199.43545085.36364152.73707701.85474721.3
20255012201311.33726167.86336823.13697492.05473671.6
20255113847714.940594712.16510414.53775982.95566322.3
20255215615119.936768515.06094776.73463234.75189244.3
20255314315318.333214910.46490866.43663084.95552164.9
20260112174313.63688567.76958034.94044983.86017683.4
20260211743612.43676497.46546043.73813872.85612632.2
20260311832812.43508728.16077723.63510252.55201341.9
20260411257612.13347978.15999593.63468242.45030141.8
20260511723111.53664948.16287643.63681362.35371381.7
20260612419911.73815058.56448243.63816332.45628871.7
20260712810511.63767098.46428953.53728312.25520831.6
20260812158810.23748337.26428713.23764412.05555211.4
20260912587410.33915787.36549523.03845731.85673221.2
2026101247169.53864756.56520262.63830641.65717131.1
2026111204148.73650785.66419652.43746991.45578230.9
2026121218418.23798114.96542832.23787011.35681990.9