If you are unlucky enough to have had swine flu then there could be a positive side to you catching the virus. Scientists believe that those who recover from swine flu are left with an extraordinary ability to fight off flu viruses. This is because in beating the H1N1 virus the body makes antibodies that can kill a number of other flu strains. The findings from the the Journal of Experimental Medicine could lead to a universal flu vaccine being developed that would protect against all strains of influenza. I will be interested to see how often I get sick after my recent severe bout of flu. With any luck I have this super immunity.