In 1999, the Centers for Disease Control and Prevention (CDC) hailed vaccines as one of the ten great public health achievements of the 20th century. Over the last few decades, scientific advances have resulted in the availability of vaccines for once-fatal illnesses, and public health investments in vaccine provision have resulted in high coverage for most routine childhood vaccines.1

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Competing Interests

CONFLICT OF INTEREST DISCLOSURES: The authors have no conflicts of interest relevant to this article to disclose.