By: Rachel Roubein, Lena H. Sun, Brady Dennis
U.S. officials are prepared to allow some of the 18 American passengers exposed to a unique strain of hantavirus to leave a special quarantine facility in Nebraska as early as Monday. But they are still negotiating with state officials over how closely the passengers should be monitored for the remainder of the 42-day quarantine after returning home, according to three people familiar with the response.

















