ANNEX 1 
CLASS 4 PATHOGENS 
* 
according to US Public Health Service classification scheme 
Alastrim, Smallpox, Monkey pox, and Whitepox, when used for transmission 
or animal inoculation experiments 
Hemorrhagic fever agents, including Crimean hemorrhagic fever (Congo), 
Junin, and Machupo viruses, and others as yet undefined 
Herpesvirus simiae (Monkey B virus) 
Lassa virus 
Marburg virus 
Tick-borne encephalitis virus complex, including Russian spring-sunraer 
encephalitis, Kyasanur forest disease, Omsk hemorrhagic fever, and 
Central European encephalitis viruses 
Venezuelan equine encephalitis virus, epidemic strains, when used for 
transmission or animal inoculation experiments 
Yellow fever virus - wild, when used for transmission or animal 
inoculation experiments 
* 
Classification of Etiological Agents on the Basis of Hazard, 4th 
edition. Center for Disease Control, Atlanta, USA, 1974. 
VI-13 
[ 475 ] 
