The Role of Mobility and Sanitary Measures on the Delay of Community Transmission of COVID-19 in Costa Rica by Luis A. Barboza, Paola Vásquez, Gustavo Mery, Fabio Sanchez, Yury E. García, Juan G. Calvo, Tania Rivas, María Dolores Pérez, Daniel Salas

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Infección asintomática por el virus influenza H1N1 (2009) en personal sanitario. Estudio Marbegrip. Resultados preliminares by Julián Olalla Sierra, Fernando de Ory Manchón, Inmaculada Casas Flecha, Natalia Montiel Quezel-Guerraz, Daniel Salas Bravo, Grupo de Trabajo para el Estudio MARBEGRIP

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Maintaining the Region of the Americas free of polio: best practices for incident management support teams by Carlos A. Emanuele, Anne E. Jean Baptiste, Ana E. Chévez, Mirta Magarinos, Maite V. Antelo, Sonia Arza, Emilia Cain, Gloria Rey-Benito, Martha Velandia-Gonzalez, Daniel Salas

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Effectiveness of COVID-19 vaccines against hospitalisation in Latin America during three pandemic waves, 2021-2022: a test-negative case-control designResearch in context by Francisco Nogareda, Annette K. Regan, Paula Couto, Ashley L. Fowlkes, Radhika Gharpure, Sergio Loayza, Juliana Almeida Leite, Angel Rodríguez, Andrea Vicari, Eduardo Azziz-Baumgartner, Daniel Salas, María Fernanda Olivares Barraza, Natalia Vergara Mallegas, Paula Rodríguez Ferrari, Viviana Sotomayor Proschle, Rodrigo Fasce Pineda, Patricia Bustos Alister, Marcela Avendaño, Iván Brstilo, Roberto Arroba Tijerino, Guiselle Guzmán Saborío, Hebleen Brenes Porras, Lorena Gobern, Antonio Paredes, Maribel Cuyan, Claudia Estrada, Christa Leal, Liz Parra, Pablo Galindo, Lucas Santos, Raúl Francisco Pérez Tasigchana, Lucía Alexandra Astudillo Vallejo, Alfredo Bruno Caicedo, Alvaro Whittenbury, Marta Von Horoch, Silvia Battaglia, Chavely Domínguez, Elena Penayo, Cynthia Vázquez, Maria José Ortega, Fabiana Michel, María Emilia Nieto, Dahiana Tritten, Viviana Ramas, Natalia Goñi, Héctor Chiparelli

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