NEW : Kim Johnson , a registered nurse with Ebola , arrives in Maryland for treatment . NEW : Frontier is holding up to 800 from multiple flights for possible exposure . NEW : And now `` 12 confirmed contacts of Amber Vinson in Ohio ... are currently under quarantine , '' according to Summit County 's assistant health commissioner Donna Skoda . Amber Johnson 's condition : She was n't sick until Tuesday , is now ` ` feeling OK '' An official counters , Amber Vinson felt fatigue , muscle ache , while in Ohio .
NEW : Kim Johnson , a registered nurse with Ebola , arrives in Maryland for treatment . NEW : Frontier is holding up to 800 from multiple flights for possible exposure . NEW : Amber Johnson 's condition : She was n't sick until Tuesday , is now ` ` feeling OK '' An official counters , Amber Vinson felt fatigue , muscle ache , while in Ohio .