Influenza vaccine effectiveness against hospitalizations in children and older adults—Data from South America, 2013–2017. A test negative design by Sofia Arriola, Carmen, El Omeiri, Nathalie, Azziz-Baumgartner, Eduardo, Thompson, Mark G., Sotomayor-Proschle, Viviana, Fasce, Rodrigo A., Von Horoch, Martha, Enrique Carrizo Olalla, José, Aparecida Ferreira de Almeida, Walquíria, Palacios, Jacqueline, Palekar, Rakhee, Couto, Paula, Descalzo, Miguel, María Ropero-Álvarez, Alba, Gonzalez, Cecilia, Loayza, Sergio, Vergara, Natalia, Bustos, Patricia, Andrade, Winston, Magda S. Domingues, Carla, Issac Montenegro Renoiner, Ernesto, Tatiane da Silva, Érica, Lima Palmeira, Swamy, Araujo da Silva, Daiana, Carolina de Lacerda Sousa, Ana, Mendonça Siqueira, Marilda, Vazquez, Cynthia, Battaglia, Silvia, Vizzotti, Carla, Baumeister, Elsa, Giovacchini, Carlos, Katz, Nathalia, Pacheco, Oscar, Barbosa, Juliana, Malo, Diana, Pulido, Paola, Garcia, Diego, Pinzón, Consuelo

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