A survey emailed Wednesday to 952 clients of the City of Kingston Maternal and Child Health Service included an accidentally attached Excel spreadsheet with the personal data of 2,112 people, ABC News reports. Dates of birth, phone numbers and addresses were included in the breach. "We're taking immediate action to independently investigate how this occurred," said City of Kingston CEO John Nevins. "We immediately notified the privacy commissioner yesterday afternoon and we'll be working closely with the privacy commissioner and acting on all his recommendations." 
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