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Center for Community Health & Prevention

Surveillance & Prevention

URMC / Center for Community Health & Prevention / Surveillance & Prevention / Emerging Infections Program / Influenza Surveillance
 

Influenza Hospitalization Surveillance

Purpose

InfluenzaActive surveillance for hospitalized laboratory–confirmed influenza cases among residents of the seven county Rochester catchment area began in 2004 as part of the . Laboratory-confirmed influenza is reportable to the New York State Department of Public Health. EIP staff collect data to determine underlying conditions, influenza testing patterns and markers of disease severity.

Goals and Objectives

  • Determine the age-specific rates of laboratory confirmed influenza associated hospitalization.
  • Determine the rate of serious influenza-associated complications, such as secondary bacterial infections, and the need for intensive care unit (ICU) admission/mechanical ventilation.
  • Identify factors that are associated with severe illness or influenza-associated complications.
  • Evaluate adherence to influenza vaccination recommendations.

Activities

Active surveillance for laboratory-confirmed influenza hospitalizations is conducted among residents of the seven county Rochester catchment area. A case is defined as a resident in the catchment area having a hospital admission with a laboratory confirmed influenza infection. FluSurv-Net data is used to generate national estimates of the total numbers of flu cases, medical visits, and hospitalizations. 

Comprehensive and aggregate data analyses for this project are ongoing and available at the following websites:

  • NYS:
  • CDC:
  • Monroe County: 

Data

The incidence of influenza hospitalizations varies by season and by age group and depends on the circulating influenza strains and the influenza vaccine efficacy. 

flu surveillance graph

Incidence from the 2020-2021 season was lower than expected due to the COVID-19 pandemic.

2023-2024 Monroe County Flu Season Report

View the latest data for Monroe County on the . Get an in-depth and interactive look at the details, including number of ED visits, number of cases, rates by age group, and more.

Selected Publications

  • White EB, O'Halloran A, Sundaresan D, Gilmer M, Threlkel R, Colón A, Tastad K, Chai SJ, Alden NB, Yousey-Hindes K, Openo KP, Ryan PA, Kim S, Lynfield R, Spina N, Tesini BL, Martinez M, Schmidt Z, Sutton M, Talbot HK, Hill M, Biggerstaff M, Budd A, Garg S, Reed C, Iuliano AD, Bozio CH. . MMWR Morb Mortal Wkly Rep. 2023 Oct 13;72(41):1108-1114. doi: 10.15585/mmwr.mm7241a2. PMID: 37824430; PMCID: PMC10578954.
  • Doyle JD, Garg S, O'Halloran AC, Grant L, Anderson EJ, Openo KP, Alden NB, Herlihy R, Meek J, Yousey-Hindes K, Monroe ML, Kim S, Lynfield R, McMahon M, Muse A, Spina N, Irizarry L, Torres S, Bennett NM, Gaitan MA, Hill M, Cummings CN, Reed C, Schaffner W, Talbot HK, Self WH, Williams D. Influenza Other Respir Viruses. 2023 Dec 17;17(12):e13228. doi: 10.1111/irv.13228. PMID: 38111901; PMCID: PMC10725795.
  • Famati EA, Ujamaa D, O'Halloran A, Kirley PD, Chai SJ, Armistead I, Alden NB, Yousey-Hindes K, Openo KP, Ryan PA, Monroe ML, Falkowski A, Kim S, Lynfield R, McMahon M, Angeles KM, Khanlian SA, Spina NL, Bennett NM, Gaitán MA, Shiltz E, Lung K, Thomas A, Talbot HK, Schaffner W, George A, Staten H, Bozio CH, Garg S. Open Forum Infect Dis. 2023 Nov 29;10(12):ofad599. doi: 10.1093/ofid/ofad599. PMID: 38130595; PMCID: PMC10733180.
  • Sumner KM, Masalovich S, O'Halloran A, Holstein R, Reingold A, Kirley PD, Alden NB, Herlihy RK, Meek J, Yousey-Hindes K, Anderson EJ, Openo KP, Monroe ML, Leegwater L, Henderson J, Lynfield R, McMahon M, McMullen C, Angeles KM, Spina NL, Engesser K, Bennett NM, Felsen CB, Lung K, Shiltz E, Thomas A, Talbot HK, Schaffner W, Swain A, George A, Rolfes MA, Reed C, Garg S. Lancet Microbe. 2023 Sep 25:S2666-5247(23)00187-8. doi: 10.1016/S2666-5247(23)00187-8. Epub ahead of print. PMID: 37769676.

Adams K, Tastad KJ, Huang S, Ujamaa D, Kniss K, Cummings C, Reingold A, Roland J, Austin E, Kawasaki B, Meek J, Yousey-Hindes K, Bennett NM, Gaitan MA, et al.  MMWR Morb Mortal Wkly Rep. 2022 Dec 16;71(50):1589-1596. doi: 10.15585/mmwr.mm7150a4. PMID: 36520656.

  • Holstein R, Dawood F, O'Halloran A, Cummings C, Ujamaa D, Kirley PD, Yousey-Hindes K, Fawcett E, Monroe M, Kim S, Lynfield R, McMullen C, Muse A, Bennett NM et al. Ann Internal Med. December 2021, https://doi.org/10.7326/M21-3668.
  • Cummings CN, O'Halloran AC, Azenkot T, Reingold A, Alden NB, Meek JI, Anderson EJ, Ryan PA, Kim S, McMahon M, McMullen C, Spina NL, Bennett NM, Billing LM, Thomas A, Schaffner W, Talbot HK, George A, Reed C, Garg S. Infect Control Hosp Epidemiol. 2021 Oct 5:1-7. doi: 10.1017/ice.2021.392. Epub ahead of print. PMID: 34607624.
  • O’Halloran AC, Holstein R, Cummings C, Bennett NM, et al. JAMA Netw Open. 2021;4(8):e2121880. doi:10.1001/jamanetworkopen.2021.21880
  • Chow EJ, Rolfes MA, O'Halloran A, Anderson EJ, Bennett NM, Billing L, Chai S, Dufort E, Herlihy R, Kim S, Lynfield R, McMullen C, Monroe ML, Schaffner W, Spencer M, Talbot HK, Thomas A, Yousey-Hindes K, Reed C, Garg S.; Ann Intern Med. 25 August 2020. Online ahead of print. doi:10.7326/M20-1509. PMID: 32833488.
  • Sloan C, Chandrasekhar R, Mitchel E, Ndi D, Miller L, Thomas A, Bennett NM, Chai S, Spencer M, Eckel S, Spina N, Monroe M, Anderson EJ, Lynfield R, et al. Epidemics. 2020 June; 31, doi.org/10.1016/j.epidem.2020.100387.
  • Chow EJ, Rolfes MA, O'Halloran A, Alden NB, Anderson EJ, Bennett NM, Billing L, Dufort E, Kirley PD, George A, Irizarry L, Kim S, Lynfield R, Ryan P, Schaffner W, Talbot HK, Thomas A, Yousey-Hindes K, Reed C, Garg S. JAMA Netw Open. 2020 Mar 2; 3(3):e201323. doi: 10.1001/jamanetworkopen.2020.1323. PMID: 32196103 [PubMed - in process]
  • Czaja CA, Miller L, Alden N, Wald HL, Cummings CN, Rolfes MA, Anderson EJ, Bennett NM, Billing LM, Chai SJ, Eckel S, Mansmann R, McMahon M, Monroe ML, Muse A, Risk I, Schaffner W, Thomas AR, Yousey-Hindes K, Garg S, Herlihy RK. . Open Forum Infect Dis. 2019 Jul 1;6(7). doi: 10.1093/ofid/ofz225
  • Rolfes MA, Flannery B, Chung J, O’Halloran A, Garg S, Belongia EA, Gaglani M, Zimmerman R, Jackson ML, Monto AS, Alden NB, Anderson E, Bennett NM et al. Effects of Influenza Vaccination in the United States during the 2017-2018 Influenza Season. Clinical Infectious Diseases. 2019 Feb.,