the disease from becoming more severe. i m hopeful that because of all the previous immunity, that while other people will be infected, most of the disease is going to be quite mild. reporter: although vaccine rates remain low in south africa just over 25% so many people have been previously infected with qorvgd it s providing high levels will of natural immunity. south africa s ramping up its inoculation drive. health regulators have approved, and the government is considering maxing vaccines : atbora patta, thank you. and we want to turn now to the trifle a former minnesota police officer who said she made a fatal mistake drawing her gun on duante wright, instead of her taser, shooting and killing the unarmed 20-year-old. david schuman of our minneapolis station wcco was in court for the opening statements. i killed a boy.