article_snippet.sent: 50,000 μSv: Maximum allowable yearly occupational dose in the US .
article_snippet.sent: 100,000 μSv: Lowest yearly dose linked to increased risk of cancer .
article_snippet.sent: 2,000,000 μSv: Severe and potentially fatal .
article_snippet.sent: A dosage of 2,000,000 μSv is considered severe and potentially fatal .
article_snippet.sent: Exposure to this kind of radiation is so significant that in 1994 US pilots and cabin crew were classified as 'radiation workers' and the maximum allowable yearly occupational does is 50,000 μSv.
article_snippet.sent: The lowest yearly dose that has been linked to an increase in cancer risk is 100,000 μSv, while a dosage of 2,000,000 μSv is considered severe and potentially fatal.