PB2-E627K mutation also allow efficient replication of avian influenza viruses, the 336C and 376C, the ability to replicate that facilitate the expansion 336C avian influenza viruses in the upper respiratory tract of humans, the property may. allows the virus to spread easily by sneezing and coughing. Efficient simulation - at 37 6C allows the bird flu virus to replicate in human lungs and cause pneumonia, acute complications.
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