Introduction. The risk for Mycobacterium tuberculosis transmission among healthcare workers (HCWs) has been well known for many years. The kind of job and the incidence of tuberculosis (TB) in the community conditions the risk of TB infection among HCWs.ntroduction. The risk for Mycobacterium tuberculosis transmission among healthcare workers (HCWs) has been well known for many years. The kind of job and the incidence of tuberculosis (TB) in the community conditions the risk of TB infection among HCWs.
Keep for 1 month: utility bills, deposit and withdrawal records. If youâre self-employed, you may need your utility, cable and cell phone bills for tax purposes. Otherwise, you can dispose of them as soon as you verify your payment was processed.
How long to keep records. You must normally keep records for at least 6 years from the end of the last company financial year they relate to. You may need to keep records longer if: 1  they show a transaction that covers more than one of the companyâs accounting periods. 2  the company has bought something that it expects to last more than 6 years, like equipment or machinery. 3  you sent your Company Tax Return late.