Although the avian influenza virus can only be transmitted by birds, certain subtypes of the virus could also infect humans. The virus can be transmitted directly from infected birds. Most commonly, it is domestic birds but wild birds can also infect hunters and tribal people.
Indirectly, the virus can also enter the body through infected food, water, objects, air, and polluted air. In cases of pandemic or epidemic, the flu virus could be airborne. You can read the full information about the importance of the bird flu mask.
Flu-infected individuals carry the virus along with them everywhere they go. They spread it via their nasal secretions or bodily discharges to other objects and air. Personal Protective Equipment, or PPE, is equipment that health professionals can use when working in hazardous environments.
The most popular are nose and mouth respirators, or 'Masks'. Because the bird flu virus can be microscopic, masks for birds are extremely specific. These masks were designed according to the National Institute for Occupational Safety and Health guidelines. The filtering efficiency is the basis of the masks.
They fall into three categories: Type 95, Type 99, and Type 100. These filters filter out microscopic particles (0.3 microns wide) at 95%, 99.7%, and 99.7% respectively. Filters are also classified based on their ability to reduce filter efficiency.