ARVI (acute respiratory disease) or simply cold is caused by different types of viruses affecting the top respiratory organs. Now more than two hundred viral infections are known, generally they affect throat, nose and trachea, leading to complications in the form of tracheitis, bronchitis and pneumonia.
ARVI is the most widespread and most known disease of mankind, it amounts fifty percent among all illnesses. It is very difficult to determine the type of virus which provoked the disease; the final diagnosis can be received having only carried out laboratory researches though most often it isn’t required to perform such researches as ways of treatment of ARVI of different types are actually identical.
Viruses are transmitted at close contact by air: during conversation, sneezing, tussis, etc. Disease duration usually makes some days, about three-four days of an active phase and three for an absolute recovery. However the disease can last longer in case of complications.
Till nowadays scientists can’t understand from where viruses appear however they appeared on our planet even long before people came into being, and within this time they managed to spread and adapt so well that they are second to none on the earth. This ideal object has one, but very important disadvantage: it can’t be in the person more than 14 days. After two periods of active reproduction all the “community” of viruses completely perishes, thus facilitating the actions of doctors in opposition to infection.