Never be afraid to ask questions. The purpose of containment and special work practices is to prevent accidental exposure. Exposure means the accidental transmission of a disease to a worker who enters an area to perform a service. Biohazardous materials cause infections. Your supervisor will update you periodically, lab personnel will tell of specific hazards in their areas.
Most injuries are due to cuts, direct contact with materials and eye contact.
Look for the symbol. Use common sense when working near these materials. Always wash your hands after leaving these areas. You will not be working with biohazardous materials, you need no special inoculation or shots. If you are on any medication and have to work in these areas, let your physician know.