Eight Singapore Airlines flight attendants sickened by carbon monoxide in San Francisco

Examiner.com, 7 Jan 2011
Singapore Airlines flight attendants taken from Marriott Hotel in San Francisco with flu-like symptoms, thought to be caused by carbon monoxide poisoning.
As many as eight flight attendants who all worked in the same Singapore Airlines plane were treated by paramedics at a hotel in downtown San Francisco early Friday morning. Full story

Related:
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Heater causes carbon monoxide exposure at SF hotel - San Jose Mercury News