Although the proportion of 50- to 59-year-olds receiving the herpes zoster vaccine jumped from 2.9% in 2008 to 4.3% in 2011, the rate remained relatively low, according to a study presented at the Interscience Conference on Antimicrobial Agents and Chemotherapy. Among adults aged 60 and older, the vaccination rate substantially increased from 6.7% in 2008 to 15.8% in 2011. "Socioeconomic factors such as income, education, race, and type of insurance may influence likelihood to be vaccinated," study author Melissa D. Johnson said.

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