Though 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 food items 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 might be reasonably high, in cases of epidemic or pandemic proportions. Infected people carry the flu virus with them wherever they travel and spread it in air and on objects they touch via their nasal secretions and bodily discharges.
Personal Protective Equipment or PPE since they are called are equipments designed for health care professionals to utilize if they are doing work in contaminated environments. Nose and mouth respirators or ‘Masks’ are the types most generally used. Bird flu masks are incredibly specific regarding the reality that the bird flu virus is microscopic and it is not easily filtered right out of the environment using conventional filters.
These masks are created on the guidelines provided by National Institute for Occupational Safety and Health (NIOSH). According to filtering efficiency, filters found in the N95 Mask fall under 3 categories, namely Type 95, Type 99 and kind 100. The proportions of microscopic (.3 micron wide) particles filtered out by these filters are 95%, 99% and 99.7%, respectively. Even the filters are categorized based on filter efficiency degradation and are hence called, N (non-immune to oil), R (oil resistant) and P (oil proof). Every person mask is tested in laboratory settings before being approved on the market. But N95 ones are disposable and cannot be cleaned.
The most frequent ones are N-95 filtering respirators which have been approved by NIOSH (also known as as Filtering Facepieces) for being effective drastically cutting down exposure risks to airborne viruses like SARS or Avian Influenza. The usage of masks is suggested to individuals employed in high contamination situations, like medical care workers attending to patients, or field workers associated with destroying the problem sources, etc.
Another set of extremely powerful, protective masks are Powered Air-Purifying Respirators (PAPRs). They may be more effective than N-95 masks in offering better protection. They are utilized by persons who cannot wear N-95 masks, like individuals with facial hair. This battery operated mask features 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 likelihood of infection from airborne viruses. It remains to get said however, that the capabilities of the masks degrade over time quprnl usage. Aerosols, if found in the working environments, degrade filters even more. Hence, N95 Mask really should not be used with 100% reliance, only as among the preventive tool. More so, you can find guidelines that should be followed while (re)using such PPE. It is hence clear that this best defense does not lie in any level of measures taken but alternatively inside the knowledge that they may be implemented.