CABEZAS, César. Novel influenza: inexorable expansion of pandemic to southern hemisphere. Revista Peruana de Medicina Experimental y Salud Pública, [S. l.], v. 26, n. 2, 2009. DOI: 10.17843/rpmesp.2009.262.1350. Disponível em: https://rpmesp.ins.gob.pe/index.php/rpmesp/article/view/1350.. Acesso em: 3 may. 2024.