A novel disease in songbirds has rapidly evolved to become more harmful to its host on at least two separate occasions in just two decades, researchers are reporting. The research provides a real-life model to help understand how diseases that threaten humans can be expected to change in virulence as they emerge. Disease virulence is something of a paradox. In order to spread, viruses and bacteria have to reproduce in great numbers. But as their numbers ...Saturday, 1 June 2013
Virulence Increases With Rapid Evolution of Diseases
A novel disease in songbirds has rapidly evolved to become more harmful to its host on at least two separate occasions in just two decades, researchers are reporting. The research provides a real-life model to help understand how diseases that threaten humans can be expected to change in virulence as they emerge. Disease virulence is something of a paradox. In order to spread, viruses and bacteria have to reproduce in great numbers. But as their numbers ...
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