Influenza vaccination of individuals with persistent asthma (ages 5-45 years)
Individuals who received a seasonal influenza vaccination (numerator), among Individuals with persistent asthma aged 5-45 (denominator)
Influenza (flu) is a common, contagious respiratory illness caused by influenza viruses, and may result in serious complications or death . Vaccination has been shown to reduce flu-related hospitalizations by up to 71% . Seasonal influenza vaccination is recommended by the Israeli Ministry of Health for all individuals (above the age of 6 months), and in particular for children, the elderly, and individuals with chronic conditions, including asthma, as Influenza contributes to asthma exacerbations. .
Individuals in the denominator who received a seasonal influenza vaccination (September 1st to February 28th)
Individuals with persistent asthma aged 5-45
 Centers for Disease Control and Prevention (CDC). 2013. “Seasonal Influenza: Flu Basics”. Available:
 Talbot, H.K., Y. Zhu, Q. Chen, J.V. Williams, M.G. Thompson, M.R. Griffin. “Effectiveness of Influenza Vaccine for Preventing Laboratory Confirmed Influenza Hospitalizations in Adults, 2011–2012 Influenza Season.” Clinical Infectious Diseases 2013, 56(12):1774–7.
 In Hebrew:תדריך חיסונים 1999. האגף לאפידמיולוגיה, משרד הבריאות. עדכון 2017. Available: [Accessed: 21-March-2018]