How does toxoplasmosis affect people with a normal immune system?

illness or none. Most healthy people have no symptoms when infected since the immune system controls the infection, and it is silent or what we cal "latent" some may have fever, swollen glands, or rarely a serious eye infection.
Usually Doesn't. With a strong immune system it usually has no effect. It is only the newborns/unborns that have serious issues in utero.