With the previous anthrax scare in 2001, industries have been racing to develop stronger protective clothing, especially for emergency personnel.
Various chemicals or infectious organisms exist which can be used in biological warfare. These chemicals and organisms will cause damage and disease by entering through the skin, and being inhaled or swallowed.
As a result of the airborne characteristics, protective clothing to protect against bio agents should minimally include disposable coveralls, shoe covers, goggles, and masks depending on the microorganism or chemical suspected.
However, it is important to remember certain organisms can cling to your equipment and exists outside for a period of time. So dispose of dispose of your clothing properly.