The outbreak was declared after two of the school's cases were deemed to be connected.
Public Health says that if there are no further connected cases at the school, the outbreak will be declared over on December 28th.
The Niagara Catholic District School Board also says there is a confirmed COVID-19 case at Our Lady of Fatima Catholic Elementary School in Grimsby.
The individual is reported to be in self-isolation.
Niagara Catholic is advising the public to follow proper COVID-19 safety protocols.
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