. 2019 Mar 18;5(1):e12480. doi: 10.2196/12480
©Yuki Lama, Dian Hu, Amelia Jamison, Sandra Crouse Quinn, David A Broniatowski. Originally published in JMIR Public Health and Surveillance (http://publichealth.jmir.org), 18.03.2019.
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Figure 1.
Number of Human papillomavirus (HPV) vaccine messages by year.