ARVI Epidemiology

The main similarity of symptoms in epidemic of ARVI epidemiology is the place of initial localization of virus: top part of respiratory organs, as it gives a possibility of diffusion by means of drop transfer from person to person.

Some viruses like adenovirus and rhinovirus can spread also through subjects (plates, spoons, etc.), and water. But an exclusive carrier of viruses is the sick person. The most dangerous is a virus carrier which doesn’t feel that he is ill as his perception of a disease for some reason “is erased”. Such virus carrier can infect maximum number of people.

At tussis the virus is capable to be transmitted to distance to 3 meters with drops. At drops drying it generally perishes, but some individuals keep the viability and in phase of “dust” will continue infection of people around. Viruses are rather hardy. They can live out of the carrier for some hours or some days (7-12).

Epidemic of a ARVI can be shown by polygenic flashes when two and more viral infections participate. It is called “effect of mixing” when in one place (work, child care centers, etc.) there are people with various level of immune protection. Close contact in such places also leads to sickness rate increase. It is noticed that the breaks of diseases which arose on the “admixed” etiology last longer (3-5 weeks), and the quantity of repeated cases of infection in this case is enlarged to several times.

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