Influenza Update 2010 2011 Season Carol M Davis

Influenza Update: 2010 -2011 Season Carol M Davis, MSPH, CPH Epidemiologist Emerging and Acute Infectious Diseases Branch Texas Department of State Health Service Contributors: Lesley Brannan, Tony Aragon, Irene Brown

Circulating Influenza Viruses Texas: 2010 -2011 influenza season through week 5

Vaccine Breakthrough • DSHS has been receiving calls asking about potential influenza vaccine breakthrough this season – Voluntary reporting of suspected cases • Influenza vaccine expectations – 70 -90% in healthy adults <65 – Less in certain subgroups (age/immunocompetence) • Antigenic testing – All 29 Texas specimens tested so far were related to a component of the 2010 -2011 vaccine – 100% of H 1 N 1, 99% of H 3 N 2 and 93% of the Flu B strains tested by the CDC were related to their respective components in the vaccine

Outbreaks • 5 nursing home influenza outbreaks reported to DSHS in 2011 – No deaths associated with these outbreaks • CDC informal survey of state flu coordinators • Recommend following CDC guidance www. cdc. gov/flu/professionals/infectioncontrol/ – – – Report outbreaks (1 confirmed case) Droplet precautions Cohorting of ill / exposed; restrict movement Provide antiviral treatment and chemoprophylaxis Vaccinate unvaccinated individuals per recommendations

Influenza Information • Weekly DSHS report www. texasflu. org • Weekly CDC report www. cdc. gov/flu/weekly/