title: Walkerton and North Battleford--key lessons for public health professionals.
mesh_terms: D002170:Canada; D004196:Disease Outbreaks; D006801:Humans; D008402:Mass Media; D011635:Public Health Administration; D012449:Safety; D014871:Water Microbiology; D018508:Water Purification; D014881:Water Supply / Q000592:standards*