This virus mostly affects the pigs and not the humans. The major rise of this disease is due to the reason that this particular A (H1N1) virus has got the components of pig and bird influenza viruses in it because of which the humans do not have the immunity towards the disease. This has made the disease ‘a pandemic viral disease’ which means that it has the ability to cause a global outbreak as it can spread from person to person.
As this virus causes acute secondary respiratory infections, it may spread very easily in a polluted atmosphere. Hence it is known as ‘swine flu’. This flu rarely affects the humans but the current outbreak is due to a new influenza A virus subtype H1N1, which is a derivative of swine influenza virus.
The WHO (world heath organization) reports that strains have not been isolated from swine. This viral infection passes among the humans easily that has ability to an unidentified mutation.
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