A new study done in Lima, Peru compared 70 rooms with natural ventilation from open windows with 12 mechanically ventilated rooms. The researchers, led by Roderick Escombe and reported in the February, 2007 edition of PloS Medicine, found the risk of infection spread to be lower in rooms ventilated with open windows. Natural ventilation dilutes the bacteria in the air more effectively than mechanical ventilation, by changing the air in the room more frequently per hour. The researchers showed that “Rooms with open windows showed a 6 – fold greater absolute ventilation than that calculated for mechanically ventilated rooms.”
Dr.'s Conclusion:
It appears as though “grandma"s remedy” of opening the windows in a sick person"s room might not only make the person feel better, but may reduce the risk of the infection spreading to others as well.
Tags: Fresh Air
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