Getting around during an attack requires special gear. They really recommend that you hole up for the duration. Some plastic sheeting and duct tape can turn a small room into a chemical and biological warfare shelter. Add some trail mix, a jug of water, zip lock bags and wet ones for sanitation, and a small vacuum cleaner with a hepa filter to provide safe fresh air, and you can last for an amazingly long time surrounded by deadly conditions.
Also, there's a prescription antibiotic, ciprofloxacin, which is highly effective against a number of biological warfare agents, as long as you start on it before the symptoms set in. You might ask your doctor to prescribe a couple weeks supply of it for you to stick in your closet.
Here's a remarkably constructive article for a liberal site:
http://www.salon.com/tech/feature/20...ons/index.html