by Doug Powell
On Dec. 4, 2011, some 44,000 runners participated in the annual Rock ‘n’ Roll marathon in Las Vegas. About 500 got sick with sapovirus.
A health district investigation determined that people were probably exposed to the virus the morning before the race — maybe at a runners’ expo where race numbers were distributed, although water distribution during the race had been suspected.
This year, organizers are promising several changes, including strict sanitation rules and a contractor supplying water to runners.
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