Where do infectious diseases come from?

Many of the major human infectious diseases, including some now confined to humans and absent from animals, are 'new' ones that arose only after the origins of agriculture. Where did they come from? Why are they overwhelmingly of Old World origins? read more

The causes of infectious diseases vary, but in general, they are caused by infectious agents (microscopic organisms) that do things in the body that are detrimental to us is some way. Once they are inside of us or even on our skin, microbes typically begin replicating and consuming resources needed by our own cells. read more

The evolution of infectious disease. Cockburn A. Infectious diseases have been evolving from the earliest days of life on earth. read more