Viruses or how these micro asses manage to cause whole epidemics.

In 1918, the world was on the brink of death. On the globe with the speed of light spread epidemic of mutated influenza virus, which later will be called "Spaniard". A deadly virus, from which there was neither medicine nor immunity, struck every third person on the planet. The murderous "Spaniard" claimed more lives than the First World War.

So how can viruses (these nano particles, the size of which is a millionth of a millimeter) manage to easily conquer cities, countries and even continents?
The fact is that nature created the viruses as ideal wars.
They completely lack the needs of living beings, therefore they are invulnerable:

   - Viruses do not need to look for food, because they do not eat.
   - Do not care about the presence of air, because they do not breathe.
   "They do not care about the ambient temperature, because they can survive even in ice."
   "They do not need their own means of transportation, because they use for their own ends everything that can move: air, insects, birds, animals, people, airplanes, ships, fish, water.
   - Viruses do not need energy, as they do not need to support life in the traditional way. Their life begins only when they find a master, or rather a victim ...

The process of infection of the victim's cells with a virus looks like a real horror film (for example, "Alien"):

   - The virus literally digs into the cell, dissolving its protective membrane (shell) and injecting into it its nucleic acid (the genetic information of the virus).
   - Viral genetic code imposes on the cell its own program, thus changing all its work.
   - The enslaved cell has to stamp from the resulting viral matrix more and more new viruses that carry death to neighboring cells.

The spread of viruses is facilitated by the fact that:

    - There are practically no living organisms that are resistant to viruses on our planet.
    - Viruses mutate very quickly (they change their genetic program), so the immunity worked out at the last meeting does not work anymore.
   - There is a huge difficulty in creating antiviral drugs: outside the cell, the viruses are practically invulnerable, and by acting on the virus inside the cell, the medicine will kill the cell itself.