Swine Flu prevention with masks

Any person who is in close contact (approximately 1 metre) with someone who has flu-like symptoms (fever, sneezing, coughing, running nose, chills, muscle ache etc) is at risk of being exposed to potentially infective respiratory droplets.

At present, evidence suggests that the main route of human-to-human transmission of the new swine flu virus is via respiratory droplets, which are expelled by speaking, sneezing or coughing.
In health-care settings, studies evaluating measures to reduce the spread of respiratory viruses suggest that the use of masks could reduce the transmission of swine flu. Advice on the use of masks in health-care settings is accompanied by information on additional measures that may have impact on its effectiveness, such as training on correct use, regular supplies and proper disposal facilities. In the community, however, the benefits of wearing masks has not been established, especially in open areas, as opposed to enclosed spaces while in close contact with a person with flu-like symptoms.
Nonetheless, many individuals may wish to wear masks in the home or community setting, particularly if they are in close contact with a person with flu-like symptoms, for example while providing care to family members. Furthermore, using a mask can enable an individual with flu-like symptoms to cover their mouth and nose to help contain respiratory droplets, a measure that is part of cough etiquette.
Using a mask incorrectly however, may actually increase the risk of transmission, rather than reduce it. If masks are to be used, this measure should be combined with other general measures to help prevent the human-to-human transmission of swine flu, training on the correct use of masks and consideration of cultural and personal values.