| seroprevalence for hepatitis e virus (hev) infection among volunteer blood donors of the regional blood bank of londrina, state of paraná , brazil. | a cross-sectional study was carried out among 996 volunteer blood donors enrolled from may 1999 to december 1999 to determine the seroprevalence of hepatitis e virus (hev) infection among volunteer blood donors of the regional blood bank of londrina, state of paraná, brazil, and to evaluate whether the rate of seroprevalence of igg anti-hev antibodies is associated with sociodemographic variables and with seropositivity for hepatitis a virus (hav) infection. all participants answered the questio ... | 2006 | 16699630 |