Vermund, Sten H., and Irma Febo. “The Historic Elimination of Mother-to-Child HIV and Syphilis Transmission in Puerto Rico”. Puerto Rico Health Sciences Journal 40, no. 1 (March 29, 2021): 3–5. Accessed January 15, 2026. https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/2655.