PSU Profiles
Last Name

William A. Calo, PhD, JD

TitleAssistant Professor
InstitutionCollege of Medicine
DepartmentPublic Health Sciences
Address500 University Drive Hershey, PA 17033
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    Member, Penn State Cancer Institute

    Postdoc, University of North Carolina-Chapel Hill, Gillings School of Global Public Health (2017)
    PhD, Health Management and Policy, The University of Texas, School of Public Health (2014)
    JD, University of Puerto Rico, School of Law (2010)
    MPH, Epidemiology, University of Puerto Rico, School of Public Health (2005)
    BS, Biology, University of Puerto Rico, College of Natural Sciences (2004)

    Dr. Calo’s research primarily focuses on human papillomavirus (HPV) vaccination; he studies the impact of systems and policy factors on HPV vaccine uptake in the US. Dr. Calo is a Latino scientist with background in cancer health disparities, public health law research and implementation science.

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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    1. Shah PD, Calo WA, Marciniak MW, Golin CE, Sleath BL, Brewer NT. Service quality and parents' willingness to get adolescents HPV vaccine from pharmacists. Prev Med. 2018 Jan 09; 109:106-112. PMID: 29330033.
      View in: PubMed
    2. Colón-López V, González D, Vélez C, Fernández-Espada N, Feldman-Soler A, Ayala-Escobar K, Ayala-Marín AM, Soto-Salgado M, Calo WA, Pattatucci-Aragón A, Rivera-Díaz M, Fernández ME. Community-Academic Partnership to Implement a Breast and Cervical Cancer Screening Education Program in Puerto Rico. P R Health Sci J. 2017 Dec; 36(4):191-197. PMID: 29220062.
      View in: PubMed
    3. Calo WA, Gilkey MB, Shah P, Marciniak MW, Brewer NT. Parents' willingness to get human papillomavirus vaccination for their adolescent children at a pharmacy. Prev Med. 2017 Jun; 99:251-256. PMID: 28188796.
      View in: PubMed
    4. Correa-Fernández V, Díaz-Toro EC, Reitzel LR, Guo L, Chen M, Li Y, Calo WA, Shih YT, Wetter DW. Combined treatment for at-risk drinking and smoking cessation among Puerto Ricans: A randomized clinical trial. Addict Behav. 2017 Feb; 65:185-192. PMID: 27825036.
      View in: PubMed
    5. Gilkey MB, Calo WA, Marciniak MW, Brewer NT. Parents who refuse or delay HPV vaccine: Differences in vaccination behavior, beliefs, and clinical communication preferences. Hum Vaccin Immunother. 2017 03 04; 13(3):680-686. PMID: 27763818.
      View in: PubMed
    6. Calo WA, Gilkey MB, Shah PD, Moss JL, Brewer NT. Parents' Support for School-Entry Requirements for Human Papillomavirus Vaccination: A National Study. Cancer Epidemiol Biomarkers Prev. 2016 09; 25(9):1317-25. PMID: 27543621; PMCID: PMC5010506 [Available on 09/01/17].
    7. Gichane MW, Calo WA, McCarthy SH, Walmer KA, Boggan JC, Brewer NT. Human Papillomavirus Awareness in Haiti: Preparing for a National HPV Vaccination Program. J Pediatr Adolesc Gynecol. 2017 Feb; 30(1):96-101. PMID: 27498340.
      View in: PubMed
    8. Trogdon JG, Shafer PR, Shah PD, Calo WA. Are state laws granting pharmacists authority to vaccinate associated with HPV vaccination rates among adolescents? Vaccine. 2016 08 31; 34(38):4514-4519. PMID: 27496275; PMCID: PMC4996696 [Available on 08/31/17].
    9. Califano S, Calo WA, Weinberger M, Gilkey MB, Brewer NT. Physician support of HPV vaccination school-entry requirements. Hum Vaccin Immunother. 2016 06 02; 12(6):1626-32. PMID: 26900726; PMCID: PMC4964636 [Available on 02/22/17].
    10. Gilkey MB, Calo WA, Moss JL, Shah PD, Marciniak MW, Brewer NT. Provider communication and HPV vaccination: The impact of recommendation quality. Vaccine. 2016 Feb 24; 34(9):1187-92. PMID: 26812078; PMCID: PMC4944755 [Available on 02/24/17].
    11. Calo WA, Vernon SW, Lairson DR, Linder SH. Area-level Socioeconomic Inequalities in the Use of Mammography Screening: A Multilevel Analysis of the Health of Houston Survey. Womens Health Issues. 2016 Mar-Apr; 26(2):201-7. PMID: 26809487; PMCID: PMC4761271 [Available on 03/01/17].
    12. Calo WA, Cubillos L, Breen J, Hall M, Rojas KF, Mooneyham R, Schaal J, Hardy CY, Dave G, Jolles MP, Garcia N, Reuland DS. Experiences of Latinos with limited English proficiency with patient registration systems and their interactions with clinic front office staff: an exploratory study to inform community-based translational research in North Carolina. BMC Health Serv Res. 2015 Dec 23; 15:570. PMID: 26700176; PMCID: PMC4690234.
    13. Calo WA, Brewer NT. Trends in Genital Warts in the Era of Human Papillomavirus Vaccination. Sex Transm Dis. 2015 Dec; 42(12):669-70. PMID: 26560967; PMCID: PMC4648687 [Available on 12/01/16].
    14. Calo WA, Vernon SW, Lairson DR, Linder SH. Associations between contextual factors and colorectal cancer screening in a racially and ethnically diverse population in Texas. Cancer Epidemiol. 2015 Dec; 39(6):798-804. PMID: 26651438.
      View in: PubMed
    15. Calo WA, Fernández ME, Fernández-Espada N, Colón-López V. Exploring the role of ethnic identity on the attitudes towards HPV vaccine advertising among Puerto Ricans: a qualitative analysis. J Immigr Minor Health. 2015 Feb; 17(1):314-7. PMID: 24052477; PMCID: PMC3961571.
    16. Brewer NT, Calo WA. HPV transmission in adolescent men who have sex with men. Lancet Infect Dis. 2015 Jan; 15(1):8-9. PMID: 25435053; PMCID: PMC4347870.
    17. Calo WA, Krasny SE. Environmental determinants of smoking behaviors: The role of policy and environmental interventions in preventing smoking initiation and supporting cessation. Curr Cardiovasc Risk Rep. 2013 Dec; 7(6):446-452. PMID: 24634706.
      View in: PubMed
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