Usage of quadrivalent influenza vaccine among children in the United States, 2013–14

Publication date: 27 November 2015
Source:Vaccine, Volume 33, Issue 48
Author(s): Loren Rodgers, Laura J. Pabst, Liping Zhu, Sandra S. Chaves
Annual influenza vaccination is recommended for everyone ≥6 months in the U.S. During the 2013–14 influenza season, in addition to trivalent influenza vaccines, quadrivalent vaccines were available, protecting against two influenza A and two influenza B viruses. We analyzed 1,976,443 immunization records from six sentinel sites to compare influenza vaccine usage among children age 6 months–18 years. A total of 983,401 (49.8%) influenza vaccine doses administered were trivalent and 920,333 (46.6%) were quadrivalent (unknown type: 72,709). Quadrivalent vaccine administration varied by age and was least frequent among those <2 years of age.



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