I repeat this always. There is not war going on between us and mother nature. Mother cannot wage war against the children. And so it is stupid to claim that we can control the nature.
Take any subsystem of the body, its essential job is to assimilate self-compatible (be it solid food, air or mental thoughts!) and discard non-self or non-compatible elements.
That is Immunity function. Be it respiration or Digestion or you name it. All are basically sustaining our identity. All are participating in our immunity. (Immunity is a Latin word derived from word मुनि, means anyone who is moved by inward impulses. Someone who is self-inspired. Someone who is performing duties intuitively. )
There is no enemy in the nature. Every element, every organism, howsoever tiny they are, they all are acting as per their role. It is just we, the free will owners, act against the role (dharma).
Check this research to know how our nose protects us. We have solutions within.
Regular life, right food at right time in right season, enough exercise as per season and age, stress-free life, enough sound sleep – all helps. No medicines are needed. Even in present toxic environment (food, water, air)
To begin with – ask your self:
Do we even know how to breathe? Observe, how many complete breathe we take daily? Can we sense the vital Prana going in and out?
We hardly breathe properly. Most of us don’t even complete single full breathe during waking hours. Result? Immunity compromised. Even simple correction in breathing will start showing results.
The vast majority of systemic bacterial infections are caused by facultative, often antibiotic-resistant, pathogens colonizing human body surfaces. Nasal carriage of Staphylococcus aureuspredisposes to invasive infection, but the mechanisms that permit or interfere with pathogen colonization are largely unknown. Whereas soil microbes are known to compete by production of antibiotics, such processes have rarely been reported for human microbiota. We show that nasalStaphylococcus lugdunensis strains produce lugdunin, a novel thiazolidine-containing cyclic peptide antibiotic that prohibits colonization by S. aureus, and a rare example of a non-ribosomally synthesized bioactive compound from human-associated bacteria. Lugdunin is bactericidal against major pathogens, effective in animal models, and not prone to causing development of resistance inS. aureus. Notably, human nasal colonization by S. lugdunensis was associated with a significantly reduced S. aureus carriage rate, suggesting that lugdunin or lugdunin-producing commensal bacteria could be valuable for preventing staphylococcal infections. Moreover, human microbiota should be considered as a source for new antibiotics.