In general hospitals are aware of the importance of maintaining a high level of hygiene, where cleaning, floor mopping, hand-washing etc. are top priorities. However, Hospital Acquired Infections (HAIs) occur at hospitals with even the highest level of hygiene. The infection rate in the U.S. is 722.000 people pr. year. For Australia and Denmark that number is 200.000 and 54.000 people pr. year respectively. For the U.S. that results in up to $33 billion preventable annual expenditures, while for Australia and Denmark that number is $600 million and $162 million respectively.