Dr. Anthony Fauci, Director, National Institute of Allergy and Infectious Diseases, National Institutes of Health, testifies before the House Energy and Commerce subcommittee hearing looking into the effectiveness of vaccines in… WASHINGTON – For a pair of first-time presidential hopefuls, the sudden injection of the childhood vaccine debate into the 2016 campaign is a lesson in how unexpected issues can become stumbling blocks. Long-held positions can look different under the glare of the national spotlight.

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