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 household poultry but sometimes wild birds also can infect hunters, tribal people, etc. Within an indirect manner the infection 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 in the air could 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 created for health care professionals to make use of when they are working in contaminated environments. Nose and mouth respirators or ‘Masks’ are the ones most widely used. Bird flu masks are very specific pertaining to the truth that the bird flu virus is microscopic and is also not easily filtered out of the environment using conventional filters.
These masks are designed on the guidelines offered by National Institute for Occupational Safety and Health (NIOSH). Based upon filtering efficiency, the filters utilized in the N95 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. Even the filters are categorized according to filter efficiency degradation and therefore are hence defined as, N (non-resistant against 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 should not be cleaned.
The most frequent ones are N-95 filtering respirators which were approved by NIOSH (also referred to as as Filtering Facepieces) as being effective drastically cutting down exposure risks to airborne viruses like SARS or Avian Influenza. The utilization of masks is recommended to people doing work in high contamination situations, like medical care workers attending to patients, or field workers involved in destroying the problem sources, etc.
Another set of very powerful, protective masks are Powered Air-Purifying Respirators (PAPRs). They may be far better than N-95 masks in offering better protection. They are used by persons who cannot wear N-95 masks, like people who have facial hair. This battery operated mask includes a face piece with breathing tube and filters.
Even though any mask is not a warranty against influenza infection, they dramatically cut down the probability of infection from airborne viruses. It remains to become said however, that this capabilities in the masks degrade as time passes quprnl usage. Aerosols, if found in the working environments, degrade the filters even more. Hence, Mask must not be used with 100% reliance, but only as among the preventive tool. More so, you will find guidelines that should be adhered to while (re)using such PPE. It really is hence clear that this best defense will not lie in every quantity of measures taken but instead within the knowledge in which they are implemented.