From 2001 through 2004, states that permitted personal belief
exemptions had higher
nonmedical exemption rates than states that offered only religious
exemptions, and states that easily
granted exemptions had higher
nonmedical exemption rates in 2002 through 2003 compared with states with medium and difficult
exemption processes.
Saad B. Omer, M.B.B.S., M.P.H., of the Johns Hopkins Bloomberg School of Public Health, Baltimore, and colleagues conducted a study to determine if the rates of
nonmedical exemptions differ and have been increasing in states that offer only religious vs. personal belief
exemptions, and if the incidence of pertussis is associated with policies of
granting personal belief
exemptions and ease of obtaining
exemptions.