Two year 10 students - a boy and a girl - at St Patrick's college, Dundas in Sydney's north west - are confirmed to have contracted the virus.
A student in year seven at Willoughby Girls High School - on Sydney's lower north shore - has also been confirmed to have contracted the disease. Both schools are likely to be closed on Tuesday and NSW Health is interviewing the affected students and their families to determine how they became ill. Image: Facebook
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