Bird flu is caused by influenza, a sort of virus that's hosted by creatures and some animal species such as pigs, horses, etc. and exactly as with any influenza virus that it propagates via air, water, lead contact, body fluids, and excreta. The contamination at air may be high during epidemics or pandemic outbreaks, with the influenza virus being airborne.
Infected individuals carry the influenza virus with them wherever they disperse and travel and spread in the atmosphere and on objects they touch via their secretions and releases. This creates such diseases like bird flu and flu contagious. One such PPE (Personal Protective Equipment) device is just really a mask worn out by people working or living in surroundings.
Nose and mouth respirators or Masks comprise filters that keep out microscopic germs of sizes as low as 0.3 microns. If you want to protect yourself from the virus then you can check innovative biotech masks that offer optimum protection to you via online sources.
Usage of effective face protection masks was widespread for curtailing the spread of respiratory diseases. Recently they were used by the personnel involved in controlling SARS.
However, the Centre for Disease Control and Prevention (CDC) reports that there have been no scientific tests that definitely demonstrate masks as 100% effective in preventing the spread of this influenza virus.
Masks can help in several ways besides obstructing flu viruses directly, however, we have to keep in our mind an unfortunate truth that no mask has been a certainty against protecting its user against the viruses. It's only that they reduce the probability of infection.