Study Finds High Regional Rates of 'Alternative' Vaccination Schedules

Mr. Robison and his colleagues noted as limitations of their study the fact that it used a strict definition of consistent shot limiting, and excluded from its analysis children who had not received any vaccinations at all. Also, the role of providers was not examined, nor was the possibility of clustering among accommodating providers.

The study was funded by a grant from the Centers for Disease Control and Prevention. Neither Mr. Robison nor his colleagues declared conflicts of interest.