Medical Officer
CDC
Alfonso C Hernandez-Romieu MD MPH is a medical epidemiologist and joined the CDC in 2020 as an Epidemic
Intelligence Officer with the Epidemiology, Research, and Innovations Branch of the Division of
Healthcare Quality Promotion. Dr. Hernandez-Romieu led outbreak investigations of Candida auris in nursing
homes and Mycobacterium tuberculosis among recipients of a contaminated bone allograft product,
provided technical infection prevention and control support to state and local health departments for
COVID-19 and healthcare-associated infections, and described the epidemiology and clinical
characteristics of post-COVID conditions. From 2022 to 2023, Dr. Hernandez-Romieu worked in the Dengue
Branch in San Juan Puerto Rico. During his time in the Dengue Branch, Dr. Hernandez-Romieu played a critical
role in modernizing dengue surveillance in the Americas region, improving data timeliness,
transparency, and utility to guide outbreak response efforts in multiple countries. In addition, he
successfully led a center-level priority project to implement and evaluate a promising vector control
strategy using Wolbachia to reduce dengue burden. Prior to joining CDC Dr. Hernandez-Romieu
completed his Infectious Diseases fellowship (2020) and Internal Medicine Residency (2018) at Emory
University. He received his Doctor of Medicine from the Universidad Nacional Autonoma de Mexico
(2011) and a Master of Public Health from the Rollins School of Public Health at Emory University (2013).
Dr. Hernandez-Romieu is currently a Medical Officer in the Outbreak and Community Response Team in
the Coronavirus and Other Respiratory Virus Division in the NCIRD, where he leads community-based studies of respiratory viruses to guide policy and program implementation and assists with preparedness and outbreak response to respiratory viral pathogens.