Answer:

quarantine

Answer	Crossword Clue
QUARANTINE	Enforced isolation
QUARANTINE	Involuntary isolation
QUARANTINE	Keep inside

QUARANTINE	From Italian for "forty days"
QUARANTINE	What the yellow jack indicates.
QUARANTINE	Action invoked against Cuba.
QUARANTINE	Isolate.
QUARANTINE	Isolate
QUARANTINE	Forty days, literally