In the absence of a vaccine many Governments have ordered large quantities of antiviral drugs (typically enough for emergency workers and those deemed "at risk" like the elderly)...but I read that most of these orders are for delivery in 2007 - they can't be filled any faster. If it got started in humans now it could be global in less than three months. This is one reason why the fight against the animal version is so important - it buys time to prepare.