Update on Weeks 52 and 53 (December 21–January 3, 2010):

• Two incidents of mass carbon monoxide (CO) poisoning occurred in public places (a church and a forest ranger station), exposing a total of 34 people to CO fumes;

• One incident of accidental domestic CO poisoning, which exposed 17 people, was linked to the use of radiant panel heating in an enclosed room.