Resistance to Infection/Reinfection by Schistosoma mansoni is not augmented by three treatments with 45 days intervals oleh Alda Maria Soares Silveira, Lucia Alves de Oliveira Fraga, Aluizio Prata, Rodrigo Correa-Oliveira, David A Addiss, Iramaya RC Viana, Daniel G Colley, Giovanni Gazzinelli