Rules page 5 wrote:
The games takes place over a series of rounds, called days. Each day contains the following phases in order: Crowd Setup...Player Actions...End of Day.
Pretty self-explanatory there. You setup the crowd then take turns performing actions. You perform "an action" on your turn, as expressed on page 6. When one player has performed an action, the next player performs an action. If the action requires the placement of an action token, that happens. If you ever start your turn with action tokens on consequences, you must resolve ALL consequences, left to right, top to bottom, for that player before they can take an additional action. Alternatively, a player may pass skipping both consequence resolution and any subsequent action. They are now out of the round (day).
Players 1-3 are playing the game.
3: quarantine (places action token)
2: crowd control (places action token)
3: QUARANTINE CONSEQUENCE
evacuate (places an action token)
1: attack (places an action token
2: CROWD CONTROL CONSEQUENCE
3: EVACUATE CONSEQUENCE
This cycle repeats until all players have passed. This ends the round (day) and you proceed to the End of Day steps.