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I'm going to say because there trying to make sure you are who you are..sorry I'm not all there today.. I know this isn't a good answer
Health literacy is the degree which people have the capacity to obtain, process, and understand the basic health information and services, needed to make better health decisions.
Hope this helps
Answer:
Records must be kept on exposure monitoring for asbestos for at least 30 years, and worker medical surveillance records retained for the duration of employment plus 30 years.