It's OK, GWB has it all under control.
Don't let the suggestion to by duct tape and plastic to seal off your house from deadly gas fool you. If that really worked, they'd be handing it out to soldiers instead of the multi-thousands-of-dollars-per-unit protective suits.
The real reason for the plastic and tape is so that the military will have something to neatly roll the contaminated victim's dead bodies up in for proper disposal once things go bad.