“…No systematic epidemiological studies of the prevalence of HTLV are available for the general population of Brazil, although studies of blood donors do provide some insights into infection rates. The seroprevalence of this virus in blood donors varies considerably among Brazilian states (Figure 2), with the highest prevalence typically occurring in the North (Acre, Amazonas, Amapá, Pará, Rondônia, Roraima, and Tocantins states) and Northeast (Alagoas, Bahia, Ceará, Maranhão, Paraíba, Pernambuco, Piauí, Rio Grande do Norte, and Sergipe) (Semeão et al, 2015;Catalan-Soares et al, 2005;Morais et al, 2017;Galvão-Castro et al, 1997;Ribeiro-Lima et al, 1999;Maneschy et al, 2021;Silva & Silva, 2015;Ribeiro et al, 2018), while the lowest rates are found in the South (Paraná, Rio Grande do Sul, and Santa Catarina) and Southeast (Espírito Santo, Minas Gerais, Rio de Janeiro, and São Paulo) regions (Semeão et al, 2015;Pereira & Bonafé, 2015;Catalan-Soares et al, 2005;Galvão-Castro et al, 1997;Veit et al, 2006). In previous studies, the HTLV seroprevalence in potential blood donors from the state of Pará ranged from 0.3% (Maneschy et al, 2021) the approach, the antigens used, and the class of antibodies detected by the procedure (Maneschy et al, 2021).…”