Select agent regulations were revised in October 2012 to designate thirteen "Tier 1" agents with a documented risk of causing a high consequence event higher than other BSATs. Criteria for Tier 1 status were (1) Ability to produce a mass casualty event or devastating effects to the economy; (2) Communicability; (3) Low infectious dose; and (4) History of or current interest in weaponization based on threat reporting. In the same revision Chapare virus, Lujo virus, and SARS-associated coronavirus (SARS-CoV) were added to the list of select agents. Department of Health and Human Services (2012), “Possession, Use, and Transfer of Select Agents and Toxins; Biennial Review”, Federal Register / Vol. 77, No. 194 / Friday, October 5, 2012 / Rules and Regulations, pg 61084. Government Printing Office [www.gpo.gov] [FR Doc No: 2012-24389]
