the outbreak killed 20 and sickened 577 people between november 2016 and october 2017.
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the school in yarmouth that year had a low opt-out rate � 2 percent, the superintendent said � so there was a cap on the amount of disruption an illness could cause.
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when robert had to go on full medical disability in his early 50s after hurting himself at work, helen went back to work, this time in the oil industry.
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