Since 1990, BC Cancer has been involved in eight cancer cluster inquiries related to B.C. schools. None of them found evidence of a cancer cluster, says the agency.
Epidemiologists are halfway through an investigation into a potential cancer cluster at a B.C. school, Glacier Media has confirmed.
Several people in the school’s community said they never heard from the district or health officials until the existence of the investigation was revealed by the press last Friday, or when SD42 superintendent Harry Dhillon and Alouette Elementary released a letter to family members that same day. Before she became pregnant, Dayna Smelser would bounce from classroom to classroom at Alouette Elementary, teaching French to one class, art to another.
Smelser continues to receive treatment but says she has no idea if she’ll ever be able to return to work.It’s not clear if Smelser's case is part of that investigation, which has only been described as investigating cases of “breast cancer.” In another letter Wednesday, district superintendent Dhillon said results of an air quality test meet WorkSafeBC’s regulatory requirements. He said the BC Centre for Disease Control reviewed the results and said they have “no concerns.”
According to CDC guidelines updated in 2022, step one includes establishing lines of communication to understand the profiles of those involved, the geographic area of the potential cancer cluster, and any specific concerns around environmental exposure, family histories of cancer or behavioural risk factors. At this point, the cancer agency might pull together a team of experts, and continue gathering community data.
Phase four of an investigation involves actually conducting that epidemiologic study to assess the association between cancers and environmental causes. Dummer says that’s because the most common environmental toxins found in a building, such as asbestos, require decades between exposure and diagnosis. In the case of radon — a naturally occurring radioactive gas — the latency period can range from five to 15 years.
Women who drink alcohol, do shift work, eat a low-fruit diet, are overweight or smoke tobacco also have a higher risk of developing breast cancer.
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