I am not one to panic as I travelled to Argentina via the US right in the middle of the swine flu outbreak not worrying a bit about getting infected during my trip.
Still, these mutating viruses are something we have to take into serious consideration. There is not a strain of flu but maybe thousands different ones.
10 Genes, Furiously Evolving
Evolutionary biology may sometimes seem like an arcane academic pursuit, but just try telling that to Gavin Smith, a virologist at Hong Kong University. For the past week, Dr. Smith and six other experts on influenza in Hong Kong, Arizona, California and Britain have been furiously analyzing the new swine flu to figure out how and when it evolved.