The 36th National Immunization Conference of CDC

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Impact of 2000-01 Influenza Vaccine Supply Delays on Vaccine Utilization

James A. Singleton1, Glen Nowak1, Charles Washington2, Laura M Erhart3, and Karena F. Sapsis1. (1) National Immunization Program, Centers for Disease Control and Prevention, Epidemiology and Surveillance Division, 1600 Clifton Road, NE, MS E-61, Atlanta, USA, (2) NCID, PD, IB, Centers for Disease Control and Prevention, 4770 Buford Highway, CHAM 24 1018 F13, Atlanta, GA, USA, (3) NIP/ESD/Adult Vaccine-Preventable Diseases Branch, CDC, 1600 Clifton Rd, NE, MS E-61, Atlanta, GA, USA


KEYWORDS:
Influenza, BRFSS

BACKGROUND:
In 2000, delays were expected in influenza vaccine distribution due to manufacturing issues. In October 2000, the Advisory Committee on Immunization Practices (ACIP) issued updated recommendations to target initial vaccination efforts to persons at highest risk of complications from influenza, and postpone mass vaccination campaigns. Subsequently, 27 million doses were distributed by end of October (76 million in 1999), 48 million by end of November (77 million in 1999), 70 million by end of December, and 7 million doses were not distributed.

OBJECTIVE(S):
To assess how vaccine supply delays affected influenza vaccine utilization during 2000-01, and compliance with the updated ACIP recommendations.

METHOD(S):
December interview data on influenza vaccination receipt during the past 12 months for adults in 18 states, from the 1999 and 2000 Behavioral Risk Factor Surveillance System (BRFSS), were analyzed. Other data sources were reviewed, including Healthstyles©, a mail panel survey administered early summer 2001 to >3,000 persons across the U.S.

RESULT(S):
From BRFSS December interviews, influenza vaccination levels among persons aged ³65 years were 61.8 % (95% CI 56.6-67.5) in 2000 and 67.5% (95% CI 62.0-73.0) in 1999. Among persons aged 18-64 with diabetes, vaccination levels were 44.3% in 2000 and 52.7% in 1999. Among persons aged 18-64 without diabetes, vaccination levels were 20.4% in 2000 and 27.3% in 1999. Healthstyles© data to be presented include timing of influenza vaccination during 2000-01, kind of place where vaccination occurred, main reasons for not being vaccinated, and exposure to influenza vaccination messages.

CONCLUSIONS(S):
Based on survey data from 18 states, influenza vaccination levels through November 2000 were lower than levels through November 1999 in high risk and predominately healthy groups. Findings from Healthstyles© and implications for promoting influenza vaccination will be discussed.

LEARNING OBJECTIVES:
Describe impact of 2000-01 influenza vaccine supply delays on vaccine utilization, and develop influenza vaccination promotion strategies.

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