Although the aCovid-19 virus is hosted by bats, some particular subtype might affect other mammals too, including humans. In a direct manner the virus is contacted from infected birds, mostly domestic poultry but sometimes wild birds also can infect hunters, tribal people, etc. Within an indirect manner the problem can enter the human system via edibles infected with the virus, polluted water, objects, air, food, etc. by the bodily secretions or excretions of infected birds. The flu virus being airborne, the contamination within the air may be reasonably high, in the event of epidemic or pandemic proportions. Infected people carry the flu virus with them wherever they travel and spread it in air as well as on objects they touch via their nasal secretions and bodily discharges.
Personal Protective Equipment or PPE since they are called are equipments intended for health care professionals to make use of when they are employed in contaminated environments. Nose and mouth respirators or ‘Masks’ are the types most generally used. Bird flu masks are extremely specific regarding the truth that the bird flu virus is microscopic and is not easily filtered out of the environment using conventional filters.
These masks are created on the guidelines offered by National Institute for Occupational Safety and Health (NIOSH). Based upon filtering efficiency, the filters found in the Mask fall under 3 categories, namely Type 95, Type 99 and Type 100. The proportions of microscopic (.3 micron wide) particles filtered out by these filters are 95%, 99% and 99.7%, respectively. Also the filters are categorized according to filter efficiency degradation and therefore are hence defined as, N (non-resistant to oil), R (oil resistant) and P (oil proof). Each individual mask is tested in laboratory settings before being approved on the market. But N95 ones are disposable and can not be cleaned.
The most common ones are N-95 filtering respirators that have been approved by NIOSH (also called as Filtering Facepieces) for being effective drastically cutting down exposure risks to airborne viruses like SARS or Avian Influenza. The usage of masks is recommended to individuals employed in high contamination situations, like healthcare workers attending to patients, or field workers involved with destroying the problem sources, etc.
Another set of very powerful, protective masks are Powered Air-Purifying Respirators (PAPRs). These are more effective than N-95 masks in offering better protection. These are generally employed by persons who cannot wear N-95 masks, like people with facial hair. This battery operated mask includes a face piece with breathing tube and filters.
Even though any mask is not really a guarantee against influenza infection, they dramatically cut down the probability of infection from airborne viruses. It remains to become said however, the capabilities in the masks degrade as time passes quprnl usage. Aerosols, if contained in the working environments, degrade the filters even more. Hence, N95 Mask should not be used with 100% reliance, but only as among the preventive tool. More so, you will find guidelines that need to be adhered to while (re)using such PPE. It really is hence clear the best defense fails to lie in almost any amount of measures taken but rather in the knowledge with which these are implemented.