_:b56808730 . _:b56808732 _:b56808733 . _:b56808730 _:b56808732 . _:b56808730 _:b56808731 . _:b56808731 "C0019700" . _:b56808731 "T058" . _:b56808733 . _:b56808730 "0.84"^^ . _:b56808730 . _:b56808730 . _:b56808733 "seroprevalence" . _:b56808732 .