Toho Soma

Toho Soma, MPH, MS

Senior Research Associate


Portland Campus
On campus

Mr. Soma works on program evaluation and quality improvement for various projects in the Center for Excellence in Public Health (CEPH), including Primary Care Training and Enhancement, Chronic Disease Prevention Evaluation, and Statewide Substance Use Prevention Services. He also supervises a team of evaluators in CEPH.

He was previously the Director of Public Health for the City of Portland, and currently serves on the boards of the Maine Health Access Foundation and the Daniel Hanley Center for Health Leadership.



MPH, Epidemiology and Biostatistics
University of California at Berkeley
MS, Health Informatics
University of New England
BA, Anthropology
Johns Hopkins University


Selected publications

Operario D, Soma T, Underhill K. Sex work and HIV status among transgender women: systematic review and meta-analysis. J Acquir Immune Defic Syndr. 2008 May 1;48(1):97-103.

Nemoto T, Operario D, Keatley J, Han L, Soma T. HIV risk behaviors among male-to-female transgender persons of color in San Francisco. Am J Public Health. 2004 Jul;94(7):1193-9.

Nemoto T, Operario D, Soma T, Bao D, Vajrabukka A, Crisostomo V. HIV risk and prevention among Asian/Pacific Islander men who have sex with men: listen to our stories. AIDS Educ Prev. 2003 Feb;15(1 Suppl A):7-20.

Nemoto T, Operario D, Soma T. Risk behaviors of Filipino methamphetamine users in San Francisco: Implications for prevention and treatment of drug use and HIV. Public Health Rep. 2002; 117(Suppl 1):S30-8.

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