Alexandra Sierra

Efficacy of Pneumococcal Nontypable Haemophilus influenzae Protein D Conjugate Vaccine (PHiD-CV) in Young Latin American Children: A Double-Blind Randomized Controlled Trial

Miguel Tregnaghi, Xavier Sáez‐Llorens, Pío López et al. · PLoS Medicine · 2014 · 221 citations · Full text

Non-typeable Haemophilus influenzae and Streptococcus pneumoniaeas primary causes of acute otitis media in colombian children: a prospective study

Alexandra Sierra, Pío López, Mercedes A. Zapata et al. · BMC Infectious Diseases · 2011 · 41 citations · Full text

Combined, Concurrent, and Sequential Administration of Seasonal Influenza and MF59-Adjuvanted A/H5N1 Vaccines: A Phase II Randomized, Controlled Trial of Immunogenicity and Safety in Healthy Adults

Pío López, Yolanda Caicedo, Alexandra Sierra et al. · The Journal of Infectious Diseases · 2011 · 13 citations