Barbara Lewis (Healthcare Administration and Policy) and Francisco Sy (Environmental and Occupational Health) published the article "Analysis of CEPH-accredited online public health doctoral programs and MPH degree holder demand" in the journal Frontiers in Public Health. Lewis is a doctoral student.

The number of doctoral programs to train future public health leaders is critical in meeting the demand of global health challenges in the 21st century. Ten United States online public health doctoral programs accept only a fraction of interested learners. This research examines the launch of the first online public health doctoral program, accredited by the Council on Education for Public Health, and compares nine similar programs that have followed in the ensuing 12 years. Survey results highlight the demand by Master of Public Health degree holders for online public health doctoral programs.