Blue Flu!
From Arkham Horror Wiki
Blue Flu! is a mythos card. It first appeared in the Arkham Horror board game.
Card Information
Mythos Type: Headline
Gate Opens: The Unnamable
Clue Appears At: *Woods
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Mythos Ability: All investigators in jail are released. No investigators may be arrested until the end of next turn. Leave this card in play until then to indicate this.
