The potential global pandemic. I posted about Marburg, and here is one follow-up demonstrates the irony of a virus. If it kills most of its victims, it never gets as chance to spread worldwide. If it mutates, and kills fewer of the victims, it might be off and infecting us all. In Vietnam, A Dark Side To Good News On Bird Flu (washingtonpost.com): "If a disease quickly kills almost everyone it infects, it has little chance of spreading very far, according to international health experts. The less lethal bird flu becomes, they say, the more likely it is to develop into the global pandemic they fear, potentially killing tens of millions of people."