Measles outbreaks in religious groups exempt from immunization laws.

Area of Science:

• Public Health
• Epidemiology
• Infectious Disease Control

Background:

• State immunization laws present challenges for disease control, particularly during measles epidemics, when religious exemptions are in place.
• Christian Scientists, a religious group with exemptions, were involved in two distinct measles outbreaks.

Purpose of the Study:

• To describe two measles outbreaks within communities of Christian Scientists.
• To evaluate control strategies employed during these outbreaks.
• To inform public health officials on managing outbreaks in religiously exempt populations.

Main Methods:

• Case investigation and data collection during two measles outbreaks.
• Implementation and assessment of control measures, including vaccination, quarantine, and dispersal.
• Analysis of disease transmission and outcomes.

Main Results:

• Two outbreaks occurred: 136 cases at a Christian Science college and 51 cases at a Christian Science camp.
• College outbreak control involved immunization and quarantine, resulting in three deaths (2.2% case-fatality ratio).
• Camp outbreak control involved dispersal and home quarantine, with no reported serious complications.

Conclusions:

• Effective disease control in religiously exempt groups requires awareness of legal rights and tailored strategies when standard immunization is not feasible.
• Rapid case identification, investigation, and appropriate interventions like quarantine or vaccination are crucial for managing outbreaks in these settings.
• No community transmission was observed in either outbreak, highlighting the potential effectiveness of targeted public health interventions.