November 13, 2014
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Tdap, MCV4 vaccination uptake improved compared with HPV vaccination

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Tdap and the quadrivalent meningococcal conjugate vaccination rates increased more than HPV vaccination rates from 2007 to 2013 among children aged 11 years living in New York City, according to study results.

To determine vaccine uptake and co-administration among children aged 11 years, Monica Sull, MPH, of the New York City Department of Health, and colleagues assessed data from the Citywide Immunization Registry. For children born in 1996 to 2000, catch-up vaccination was monitored through 2013. Data for HPV vaccination among boys was from 2010 to 2013. The researchers defined co-administration as a visit where MCV4 (Menactra, Sanofi-Pasteur) or HPV vaccine were co-administered with Tdap.

During the first year of Tdap requirement there was a significant increase in Tdap vaccine administration, especially in late summer and early fall of 2007. Tdap vaccine uptake increased 305.9% from August 2006 to August 2007, when vaccine uptake peaked.

Receipt of MCV4 and the first dose of HPV vaccine also increased during the first year of Tdap requirement.

However, while doses of MCV4 significantly increased each year, HPV vaccine uptake decreased among girls. Conversely, HPV vaccine uptake among boys began to significantly increase in January 2010 and continued to rise until reaching similar dosage rates to girls by 2012.

From 2007 to 2013, co-administration of MCV4 increased from 29% (95% CI, 28.6-29.3) to 65.4% (95% CI, 65-65.8), indicating a 36.4 percentage point increase (P<.001).

For each study year, the proportion of Tdap vaccination visits that included co-administration of MCV4 was greater than co-administration of first dose of HPV (P<.001).

Among children born in 1996, 52.8% of children received Tdap at age 11 years and 19.3% received MCV4 by 2007. At the end of 2013, when children were aged 17 years, Tdap coverage increased to 97.5% and MCV4 coverage increased to 92.8%.

Children born more recently had higher vaccination coverage for all vaccines, according to researchers.

“Our findings highlight the importance of promoting co-administration of all adolescent vaccines during the 11-year-old Tdap vaccination visit required for school entry in New York City,” Sull and colleagues wrote. “Increasing the number of adolescents who receive the HPV vaccine at this health care encounter can help reduce the number of adolescents unprotected in their late teens and early 20s, when nearly half of new annual HPV infections occur.”

Disclosure: The researchers report no relevant financial disclosures.