Except that Jesus taught his disciples not to wash their hands before eating -- a basic hygenic practice that people of his time certainly understood. However valuable his moral teachings may have been, Jesus is not exactly an authority on preventing disease spread...
(Also, the story of Jesus and the leper may have been nothing more than an attempt to talk about Jesus' miraculous powers.)
(Also, the story of Jesus and the leper may have been nothing more than an attempt to talk about Jesus' miraculous powers.)