The big one is coming, and it will be a flu pandemic
By Dr. Sanjay Gupta, Chief Medical Correspondent
Experts say we're "due" for a pandemic that will have a greater impact on humanity than anything else happening in the world.
Parents who lost child to flu seek answers
In CNN Films' "Unseen Enemy," some of the world's top experts explore lurking viruses and bacteria that may create the next global pandemic.
Teen's death awakes town to dangers of flu
In CNN Films' "Unseen Enemy," some of the world's top experts explore lurking viruses and bacteria that may create the next global pandemic.
Ebola survivor now helps fight it
In CNN Films' "Unseen Enemy," some of the world's top experts explore lurking viruses and bacteria that may create the next global pandemic.