Antibody to herpes simplex virus type 2 as a marker of sexual risk behavior in rural Tanzania. by Obasi, A, Mosha, F, Quigley, M, Sekirassa, Z, Gibbs, T, Munguti, K, Todd, J, Grosskurth, H, Mayaud, P, Changalucha, J, Brown, D, Mabey, D, Hayes, R