What's the difference between H1N1 and seasonal flu?

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I'm sure everyone is already aware about the H1N1 virus.Infact,it's one of the major discussion topics throughout the entire globe.This virus relates to flu and some of the symptoms of this tragic virus are fever,cold,cough,headache,backache,etc.All these symptoms are similar to seasonal flu as well.In my country,the only the can identify the virus among people is by tracking the places they have visited.What's the main difference actually among this 2?