瘟疫危機 一觸即發 (瘟疫危机 一触即发)

Add the 8 new Event cards to the 5 base game Event cards, then add 2 Event cards per player into the Player cards before shuffling and dealing; put any unused Event cards back in the box without looking (page 2).

You determine the Virulent Strain when the first Virulent Strain Epidemic card is drawn—after performing that card’s Infect step the disease with the most cubes becomes the Virulent Strain (ties are chosen randomly); if you’re also playing the Mutation or Bio‑Terrorist challenge, the purple disease cannot be chosen (page 3).

Yes—during Infections, if an Infection card is drawn for a city with at least one purple cube, you place both 1 purple cube (if purple is not eradicated) and 1 cube of the card’s color (if that disease is not eradicated), resolving any outbreaks normally (page 4).

If the Bio‑Terrorist pawn is on the board, a player may spend an action to capture him: place the Bio‑Terrorist pawn on your role card and the Bio‑Terrorist discards all cards in hand to the Infection Discard Pile (without effect) (page 5).

Purple outbreaks ‘flare out’: remove 2 purple cubes from the outbreak city (leaving 1) and place 1 purple cube on each connected city (and advance the outbreaks marker); do not add purple cubes to cities that have already had an outbreak while resolving the same action (page 6).

The non‑Terrorist players win by curing all five diseases or curing the four standard diseases and leaving no purple cubes; the Bio‑Terrorist wins if the players lose and there is at least one purple cube on the board, and the Bio‑Terrorist loses (is out) if the purple disease is eradicated—everyone loses if the players lose and there are no purple cubes (page 7).