An unusual association between HIV and Creutzfeldt-Jakob disease in a patient from northeastern Brazil José Wagner Leonel Tavares-Júnior; Francisco José Basílio; Francisco Edson Buhamra Abreu; Lucas Rodrigues Tomaz dos Santos; Pablo Picasso de Araújo Coimbra; Érico Antonio Gomes de Arruda;

Seroprevalence of hepatitis E virus infection in blood donors from Piauí State, Northeast Brazil João Paulo da Silva-Sampaio; Raniela Borges Sinimbu; Julia Trece Marques; Abilio Francisco de Oliveira Neto; Livia Melo Villar;

Safety of the yellow fever vaccine in people living with HIV: a longitudinal study exploring post-vaccination viremia and hematological and liver kinetics Edwiges Motta; Luiz Antonio B. Camacho; Ana M. Bispo de Filippis; Marcellus Costa; Luciana Pedro; Sandra W. Cardoso; Marta Cristina de Oliveira Souza; Ygara da Silva Mendes; Beatriz Grinsztejn; Lara E. Coelho;