Are you finding it difficult to get your bearings with respect to how worried we should be about swine flu? Join the club. Three views...
The UN's World Health Organization has raised the alert over swine flu to level five - indicating human-to-human transmission in at least two countries.
It is a "strong signal that a pandemic is imminent", the WHO says.
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Announcing the latest alert level after an emergency WHO meeting in Geneva, Director General Margaret Chan urged all countries to activate their pandemic plans, including heightened surveillance and infection-control measures.
She said action should be undertaken with "increased urgency".
She added: "It really is the whole of humanity that is under threat in a pandemic."
But she also said the world was "better prepared for an influenza pandemic than at any time in history".
Then here's a view that the world is not facing a pandemic. And Ben Goldacre says that while it's right to 'raise the possibility of things really kicking off', we 'don't have brilliantly accurate information'. Unpredictable therefore.
