_:b57016978 "0.81"^^ . _:b57016978 . _:b57016979 "C1707887" . _:b57016978 _:b57016980 . _:b57016978 _:b57016979 . _:b57016978 . _:b57016981 . _:b57016978 . _:b57016979 "T062" . _:b57016980 _:b57016981 . _:b57016981 "protective efficacy" . _:b57016980 .