_:b57402250 . _:b57402250 "0.83"^^ . _:b57402251 "T169" . _:b57402250 . _:b57402251 "C0439836" . _:b57402253 . _:b57402253 "seroconversion" . _:b57402250 . _:b57402252 . _:b57402250 _:b57402252 . _:b57402252 _:b57402253 . _:b57402250 _:b57402251 .