A phrase that in thisrticle is that "influenza still reigns as the number one infectious killer in modern times".This aticle was made because of the swine flu, that was originate in Mexico, for all this pandemics there are simtoms that are very strange and the one of the black dead that can kill you the same day that you will have it, others when the soldiers came from a war with a really bad pandemic, but I think that all in the world has a porpuse, this happened so the scientifics can have pills to kill this pandemics.