Scenario
Michelle is a custodian in a public elementary school. At the end of each school day, she cleans and vacuums the building, including the schools health room. While cleaning the health room she notices some dried blood on the floor.
Yes!
Any blood, wet or dry, has the potential to carry infectious Hepatitis B virus. As a result, Michelle must take precautions to prevent potential exposure to bloodborne pathogens, including Hepatitis B virus.