1. SAN DIEGO COUNTY INFLUENZA SURVEILLANCE October 14, 2015

2. Top 5 Reasons for Influenza Surveillance 1.Measure population impact 2.Identify novel influenza strains 3.Assess match of circulating strains to vaccine 4.Identify outbreaks and severe illness trends 5.Provide surveillance data to stakeholders Purpose

3. 7,395 97 155 Total Reported influenza cases ICU CASES DEATHS TOTAL REPORTED INFLUENZA CASES 78 CONFIRMED OUTBREAKS 2014-15 SUMMARY

4. Flu A Flu B Flu A/B Influenza A Influenza B Influenza A (H3) Seasonal Influenza A (H1N1)pdm09 Influenza B/Yamagata Influenza B/Victoria Influenza A/B 4,830 1,217 9 81.9% 1,122 68 49 16.7% 100 1.4% Flu TypeFlu Sub-type/Strain Count Percentage N = 7,395 2014-15 SUMMARY

5. Batched reports 2014-15 SUMMARY

7. Data Source: Reported Influenza Case Reports Prepared by County of San Diego, Health & Human Services Agency, Public Health Services, Epidemiology and Immunization Services Branch, 10/05/15 2014-15 SUMMARY

8. ICU Cases Deaths Outbreaks Calls Specimens Week ED % ILI JANFEBMARDECNOVOCTSEPAUG 2014 2015 INFLUENZA ACTIVITY HEAT MAP 3132333435363738394041424344454647484950515253123456789101112131415 00110000000000010003239172113181411591232021 322383143633105121516 438212519829663194670785682064335227512915314280603450 0000000000000000000000067148165772500103 00000000000000010102026222015271615682103001 000000000000000011220794041313730221643233101 00000000000000001156123027761526577534126 27111611862 3223332224342421233436768 866455553432 APR 2014-15 SUMMARY

9. Influenza Cases by Age Group, 2014-15 Count Rate per 100K Number and Age Specific Incident Rate

10. Influenza Outbreaks 2014-15 Week Reported 78 Flu outbreaks All outbreaks lab confirmed 1,050 total cases Avg. of 13 cases per outbreak 22 deaths among residents of outbreak locations (e.g. LTCF) N=78

11. Data Source: Reported Influenza Case Reports Prepared by County of San Diego, Health & Human Services Agency, Public Health Services, Epidemiology and Immunization Services Branch, 10/05/15 2014-15 SUMMARY

12. Data Source: Reported Influenza Case Reports Prepared by County of San Diego, Health & Human Services Agency, Public Health Services, Epidemiology and Immunization Services Branch, 10/05/15 2014-15 SUMMARY

13. 62 0 0 ICU CASES DEATHS TOTAL REPORTED INFLUENZA CASES ** CURRENT UPDATE ** Reported Influenza Cases Since July 1, 2015 Week Count

14. 2015-16 SAN DIEGO COUNTY REQUESTS All flu detections Fax to Epidemiology (858)715-6458 Lab results & demographics All deaths and ICU cases Fax Discharge Summary, H&P medical records Specimens to PHL Indicate if SNF/Outbreak related Defined as 1 Lab+ and ≥ 2 ILI cases in 72 hours PHL and Case Report Forms located on www.SDEpi.orgwww.SDEpi.org

15. INFLUENZA WATCH  Weekly summary  Emailed out Wednesdays  Starts end of October  Linked on SDIZ.org & SDEPI.org  To get on email distribution list: EpiDiv.HHSA@sdcounty.ca.gov

16. CONTACT Brit Colanter (619) 692-8415 Brit.Colanter@sdcounty.ca.gov