Wearing masks and using alcohol-based hand sanitizers may prevent the spread of flu symptoms by as much as 50 percent, a new study released Monday by University of Michigan suggests.

In a first-of-its-kind look at the efficacy of non-pharmaceutical interventions in controlling the spread of the flu virus in a community setting, researchers studied more than 1,000 student subjects from seven U-M residence halls during last year's flu season.

Wearing masks and using alcohol-based hand sanitizers may prevent the spread of flu symptoms by as much as 50 percent, a new study released Monday by University of Michigan suggests. [xinhua]

"The first-year results indicate that mask use and alcohol-based hand sanitizer help reduce influenza-like illness rates, ranging from 10 percent to 50 percent over the study period," said lead researcher Allison Aiello.

"These initial results are encouraging since masks and hand hygiene may be effective for preventing a range of respiratory illnesses," She said.

Non-pharmaceutical interventions such as hand washing and masks-- especially in a pandemic flu outbreak -- are critical to study because pharmaceutical interventions such as vaccinations and antivirals may not be available in sufficient quantity for preventing and controlling pandemic influenza outbreaks.

In February 2007, U.S. government developed an interim planning guide on the use of non-pharmaceutical interventions to mitigate an influenza pandemic. The measures include voluntary home quarantine, isolation and treatment of cases, social distancing, personal protection such as face masks and hand hygiene, and school dismissal. 　

(Xinhua News Agency October 28, 2008)