New research reveals why bird flu poses such an unusual danger to humans: it can keep multiplying even at temperatures that normally shut viruses down.

In the den of his small apartment in Stockton, 56-year-old Rex Dangerfield sits at a table. The walls are bare, and the space stripped down to essentials. The T-shirt he wears, stamped with the words ...

The so-called "Oroya fever" is an extremely severe infectious disease, yet it is classified among the so-called neglected ...