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Carla Zelaya, PhD

Assistant Scientist

Departmental Affiliation(s):

Division: Infectious Disease Epidemiology

Center & Institute Affiliation(s):

Contact Information

615 N. Wolfe St., E6535
Baltimore , Maryland   21205


SciVal Experts Research Profile


PhD , Johns Hopkins BSPH , 2008
MSc , The London School of Hygiene & Tropical Medicine


For the past seven years, Dr. Zelaya has worked collaboratively on HIV/STD prevention projects in India, Sub-Saharan Africa, Thailand, Vietnam and Russia. She is an expert in the design, implementation and assessment of behavioral interventions to reduce the risk of HIV infection and transmission, principally in marginalized populations such as injection drug users (IDUs) and men who have sex with men (MSM).

Dr. Zelaya’s primary research investigates the causes and impact of HIV stigma on HIV prevention efforts. Within this work, she focuses on the development of valid and reliable measures of psychological and social constructs and complex behaviors such as stigma, social capitol and sexual concurrency. She has recently collaborated with international working groups sponsored by UNAIDS and USAID to develop standardized measures of HIV/AIDS stigma and sexual concurrency. Dr. Zelaya specializes in developing and evaluating methods that aim to achieve sustained behavioral changes, which reduce disease transmission. She focuses on the applicability and effectiveness of these methods with various infectious diseases across multiple geographical and socio-economic contexts.


Honors and Awards

2013. International Research Scholar Award. Center for AIDS Research. Johns Hopkins University. Project entitled: Exploration of mechanisms of resilience among HIV-infected IDU in Vietnam, to inform effective, sustainable and acceptable Treatment as Prevention (TASP) interventions

Epidemiology; HIV/AIDS; Infectious Disease; Stigma; Prevention; Resilience; Measurement; Psychosocial Methods; Structural Equation Modeling; Behavior change

    Lim T, Zelaya C, Latkin C, Quan VM, Frangakis C, Ha TV, Minh NL, Go V. Individual-level socioeconomic status and community-level inequality as determinants of stigma towards persons living with HIV who inject drugs in Thai Nguyen, Vietnam. J Int AIDS Soc. 2013 Nov 13;16(3 Suppl 2):18637 (PMID: 24242257)

  • Wirtz AL, Zelaya CE, Peryshkina A, Latkin C, Mogilnyi V, Galai N, Dyakonov K, Beyrer C. Social and structural risks for HIV among migrant and immigrant men who have sex with men in Moscow, Russia: Implications for prevention. AIDS Care. 2014 Mar;26(3):387-95 (PMID: 23875610)



  • Zelaya CE, Sivaram S, Johnson SC, Srikrishnan AK, Suniti S, Celentano DD. Measurement of self, experienced, and perceived HIV/AIDS stigma using parallel scales in Chennai, India. AIDS Care. 2012; 24(7):846-55. Epub 2012 Jan 24. (PMID: 22272891; PMCID: Not applicable)



  • Sivaram S, Zelaya CE, A.K. Srikrishnan, Latkin C, Go VF, Solomon S, Celentano D. Associations between social capital and HIV stigma in Chennai, India: considerations for prevention intervention design. AIDS Educ Prev. 2009 Jun; 21(3):233-50 (PMID: 19519238; PMCID: Not applicable)



  • Zelaya CE, Sivaram S, Johnson SC, Srikrishnan AK, Solomon S, Celentano DD. HIV/AIDS Stigma: Reliability and Validity of a New Measurement Instrument in Chennai, India. AIDS & Behavior 2008 Sep; 12(5): 781-788 (PMID: 18030613; PMCID: Not applicable)




    Tedrow VA, Zelaya CE, Kennedy CE, Morin SF, Khumalo-Sakutukwa G, Sweat MD, Celentano DD. No "Magic Bullet": Exploring Community Mobilization Strategies Used in a Multi-site Community Based Randomized Controlled Trial: Project Accept (HPTN 043). AIDS Behav. 2012 July 16(6), Epub 2011 Aug 6  (PMID: 21822627; PMCID: PMC3400971)