You are doing some chores at home when a news broadcast on the TV interrupts your work. An automated voice drones a warning message.

THIS IS AN EMERGENCY ALERT. THE CITY IS UNDER ATTACK BY AN UNKNOWN FORCE. CHEMICAL WEAPONS HAVE CONTAMINATED PUBLIC SPACES AND INFECTED INNOCENT INDIVIDUALS WITH A HOSTILE VIRAL PATHOGEN. STAY INDOORS AND DO NOT GO OUTSIDE FOR ANYONE.

What do you do?