1. Can plagues be predicted, prevented?
Prof T Jacob John, PhD 
The Lancet 
Volume 354, (December 1999)
DOI: /S (99)
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2. Figure Six categories of human infections causing diseases
1=anthroponoses; 2-4=zoonoses (2 directly transmitted, 3 vector-borne, 4 transmitted through inanimate or non-haemoatophagous invertebrate intermediary); 5=microbes with life cycle in humans and biological vectors; 6=saphrophytes or microbes sharing life cycle between humans and invertebrates other than biological vectors.
The Lancet  , DOI: ( /S (99) )
Copyright © 1999 Elsevier Ltd Terms and Conditions

3. The Lancet 1999 354, DOI: (10.1016/S0140-6736(99)90457-9)
Copyright © 1999 Elsevier Ltd Terms and Conditions