Human influenza (aka: the flu) is an airborne disease, transmitted from person to person. Most experts think that flu viruses are spread mainly by droplets made when people with flu cough, sneeze or talk. These droplets can land in the mouths or noses of people who are nearby or possibly be inhaled into the lungs. The CDC notes that anyone within a 6-foot radius of a contagious person’s cough or sneeze is susceptible to influenza infection. People infected with the flu may be able to infect others beginning 1 day before symptoms even develop and up to 5-7 days after becoming sick.
One of the recommended ways of preventing the spread of the flu and other respiratory illness is the use of personal face masks by those infected to help contain infected sneeze and cough secretions and limits the exposure to others.
Tutem Masks performed up to a healthcare standard in three air filtration trials, see the details here.