Sunshine could be a 'major weapon' against swine flu, according to scientists.
Scientists at Wisconsin University have discovered the H1N1 swine flu causes more inflammation than seasonal flu, reports the Sun.
Swine flu also works its way deeper into the lungs, making it more likely to trigger complications such as pneumonia.
Experts at Harvard Medical School found asthmatic kids are "significantly" more likely to be hospitalised if they also have low levels of the vitamin.
According to Dr John Cannell, from the University of Washington, it is no accident colds and flu peak in winter - that's because of lack of sunlight, which means vitamin D deficiency in the body.
And he is sure the sunshine vitamin could be the key to avoiding a severe bout of swine flu.