The genomes of all influenza viruses are composed of eight single-stranded RNA segments (Figure 1). These RNAs are negative-sense molecules, meaning that they must be copied into positive-sense ...

With reports of the first human death from bird flu in the US, some Americans are feeling an uncomfortable flashback to the ...

Influenza is a common respiratory virus that is categorized into four types: A, B, C and D. Type C only causes mild infections and type D is not believed to infect humans. However, influenza A and ...