downtown christiane ski has spoken with celebrated russian medical professor and virology specialist dimitri laval for about the spread of the virus. in his new work there are 2 types of corona virus the alpha corona virus involves a human virus has been circulating among people for hundreds of years seasonal coronavirus a type of acute respiratory viral infection this year around 7 percent of acute respiratory viral infection cases are coronaviruses and we're not here with humans just got accustomed to them yes humans got accustomed to them they aren't lethal they cause some trouble especially among children wiley's virus is mostly spread in winter and winter our body is going through some restructuring or a decrease in the resistance to infections secondly when to there's a high concentration of people in houses buildings bars and other places and the high concentration of people is a condition for epidemic spread why is it happening in china there are many people them and there's a high concentration of population them they call it a deadly virus on t.v. it's not deadly it's always been and wil