According to the Associated Press, outbreaks of norovirus across Colorado have doubled in 2008 when compared with 2007.

Last year the state health department received 145 reports of outbreaks. In 2007, state health officials received reports of 72 outbreaks. Most happened in long-term care centers for senior citizens.

Officials say improved lab tests to pinpoint the infection and increased knowledge of the illness' symptoms may have led to the spike in reports. There's also a law that requires nursing homes, child-care centers and others to notify health officials about outbreaks of the highly contagious gastrointestinal illness.